Heavyweight Fishing Sage Yijiu: Skills, Boats & Quest Rewards

Sage Yijiu is the single most important service NPC in Heavyweight Fishing. He buys and upgrades your skills, hands out tickets for daily quests, sells boats, and lets you set your spawn island — all from the same friendly figure standing on Beginning Isle and Battlefield Isle. Most players walk past him at level one without realizing how much progression he unlocks.

This guide breaks down every service Sage Yijiu provides, how his quest chain on Battlefield Isle works, and which rewards to prioritize. Every value below comes from the player-compiled community information board, which the developers acknowledge but which may lag the live build.

Where to Find Sage Yijiu and What He Does

Sage Yijiu appears as a quiet NPC with two distinct service roles. He is present in Beginning Isle as a starter merchant and reappears on Battlefield Isle once you have progressed far enough to unlock that zone. His icon never moves, and he has no published respawn timer because he never despawns during a normal server session.

The four services Sage Yijiu offers on Beginning Isle and Battlefield Isle are easy to mix up, so here is a quick reference table before the deep dive: Skill Shop, Skill Upgrades, Set Spawn, Spawn Boat, and Battlefield Quests each have different currency costs, locations, and outcomes, and even experienced players routinely confuse the respawn-point binding of Set Spawn with the vessel-summoning of Spawn Boat despite both being toggled through his dialog.

Notice how two of those services — Set Spawn and Spawn Boat — are tagged separately even though they sound similar. The Set Spawn function only changes where you respawn after dying or rejoining; the Spawn Boat service actually calls a vessel to the dock so you can sail between the ten islands in the game. Both are essential, and both run through the same NPC dialog menu, which is why players mix them up.

The community information board also tags a related NPC role called Ticket Quest, which is functionally a third tab on the Sage Yijiu dialog. That tab refreshes a small set of daily or weekly ticket-based objectives that award bonus cash and skill experience. He is, in effect, the merchant, the upgrade vendor, the quest giver, and the transport facilitator rolled into one.

Buying Skills from Sage Yijiu (Skill Shop)

The first time you walk up to Sage Yijiu on Beginning Isle, the dialog menu offers a Skill Shop tab. This is where you spend Cash, Tickets, and sometimes Gems to learn new combat and fishing abilities. Every named skill you can buy from him appears in the community-run board, and the list has grown significantly since launch.

Starter Skills and How They Unlock

Your first purchases are usually low-tier combat skills that work on the smaller fish around Beginning Isle. As you level up, higher-tier skills enter the shop rotation. The community board notes that several skills are gated behind ownership of other skills, so you cannot simply buy the strongest ability first.

Some of the skills listed on the board include Astral Backstep, Heartbreaker Cleave V2, Hellbreaking Hook, Mountain Flip, River Suppression, Upside Down Fishing, Twelvefold Resolution, and Tenfold Convergence. More advanced purchases include Celestial Gatebreaker, Heavenbound Infinity, Heaven's Burden, Rolling Twin Dragons, Sever the Gate v3, and Shadowless Taji Strike. The newest additions tied to the 7/11 patch are the four Slaying techniques — Kin Slaying Fishing Art, Friend Slaying Fishing Art, Master Slaying Fishing Art, and Lover Slaying Fishing Art — which only become visible after you reach the appropriate level.

The board's cost figures should be treated as approximate. The only published mechanic is that higher skills require both cash and a non-cash currency like Tickets or Gems — that is what makes progression feel layered rather than a single grind.

Tickets and the Ticket Quest Tab

Tickets are one of the harder currencies to farm, which is why the Ticket Quest tab on Sage Yijiu's dialog matters so much. According to the community board, this tab refreshes a handful of objectives such as catching a fish above a weight threshold, clearing a small number of catches at a specific island, or using a particular skill a set number of times. Each completed ticket quest pays out Tickets directly, which you can then spend in the same dialog on skills or upgrades.

The board does not publish a fixed cooldown for the ticket refresh, so treat the cadence as "frequent" rather than committing to a specific timer. If you log in regularly, the dialog will usually have a fresh ticket task waiting.

Upgrading Skills with Essences (Skill Upgrades NPC Role)

The second tab on Sage Yijiu's dialog is the Skill Upgrades role. This is where the Essences currency becomes relevant. Essences drop from boss fights and from elite catches on islands like Frost Isle, Amber Isle, and Mistpeak Isle, and they cannot be bought directly from any other NPC.

The upgrade system works like this: you select a skill you already own, pay a number of Essences, and the skill's damage output increases by a percentage that the board does not publish in numeric form. There is no published cap on upgrade levels, but community testing suggests diminishing returns kick in after several upgrades on the same skill.

A practical tip from players is to avoid dumping Essences into starter skills because you will outgrow them by the time you reach Battlefield Isle. Save your first batch of Essences for a mid-tier skill like Astral Backstep or Hellbreaking Hook, which remain useful well into the late game. If you want a deeper walkthrough on how to spend those Essences, the Astral Backstep guide covers the priority order in detail.

Setting Your Spawn and Spawning a Boat

Two of Sage Yijiu's services handle movement rather than combat. The Set Spawn option binds your respawn point to the island you are currently standing on, and the Spawn Boat option calls a personal boat to the nearest dock so you can sail to any of the ten islands in the game.

How Set Spawn Works

When you die or leave the server, you respawn at the last island where you used the Set Spawn option. The cost is zero — Sage Yijiu performs the service for free, which makes it one of the most underused utilities in the game. New players often forget to update their spawn after unlocking Battlefield Isle, then waste five minutes sailing back from Beginning Isle every time they disconnect.

A clean habit is to set your spawn whenever you shift to a new island for a grinding session, then update it again when you return to your "home" island. The board notes no cooldown on this action, so feel free to rebind as often as you change zones.

How Spawn Boat Works

Spawn Boat is the second movement service, and it is the one that lets you actually travel. The board lists this service as paid in Cash, with the exact cost varying by island. Once purchased, the boat appears at the dock tied to that island and you can sail to any other island you have unlocked.

Because Sage Yijiu handles both movement services directly at the dock, he is effectively the only NPC you need for inter-island travel in Heavyweight Fishing. There is no separate ferryman, teleport vendor, or transport merchant on any of the ten islands, which means finishing his Ticket Quest and unlocking his full service list is one of the highest-value early investments for new players. Once he is fully upgraded, every transport interaction in the game routes through his dock, so learning his spawn window and quest requirements saves you from searching for non-existent alternatives.

Battlefield Isle Quest Chain and NPC Quest Rewards

The most rewarding service Sage Yijiu provides lives on Battlefield Isle. Once you have unlocked that zone, speaking to him opens a three-step quest chain with progressively better rewards. The board records the full chain verbatim, and the rewards are some of the best non-boss loot in the game.

Quest 1: Diamond Rod Unlock

The first Battlefield Isle quest requires you to catch five fish, each weighing at least 1.5M KG. That sounds intimidating, but the island's fish density makes it achievable in a single sitting with a mid-tier rod and decent bait. Completing this quest awards the Diamond Rod, which is one of the strongest rods in the game's base progression and remains relevant even after you unlock higher-tier rods.

Quest 2: Phoenix Annihilation Art

The second quest is the most skill-gated step in the chain, because every requirement feeds back into the Phoenix Strive Art v2 prerequisite rather than raw fishing time. Catching the Scarlet Fish and Elder Scarlet Fish at 1.5M KG forces you to set up a heavyweight fishing spawn boat in the right Scarlet zone, then leverage your sage yijiu progression to hit the weight threshold — casual rod setups will not clear the bar. Treat it as both a ticket quest and a skill audit rolled into one.

• Own the skill Phoenix Strive Art v2

• Catch fish 250 times in total

• Catch a Scarlet Fish weighing at least 1.5M KG

• Catch an Elder Scarlet Fish weighing at least 1.5M KG

The published reward is the Phoenix Annihilation Art skill, which is a high-tier combat ability tied to the Phoenix damage archetype. Because the prerequisite is owning Phoenix Strive Art v2, the chain indirectly forces you to invest in the Phoenix skill line first. If you skipped that line, this is the moment the game tells you to backfill it.

Quest 3: One Strive Heaven Gate v3

Quest 3 is the longest step in Sage Yijiu's Battlefield Isle chain and the true gatekeeper before any of the remaining top-tier slaying loot becomes available. Because it stacks three independent gates — a Draconic Koi at 2M KG, the One Strive Heaven Gate v3 skill, and a 10-fish baseline catch — it can stall players who have already cleared Quests 1 and 2, and the published board cuts off before the reward name is actually revealed.

• Catch a Draconic Koi weighing at least 2M KG

• Own the skill One Strive Heaven Gate v3

• Catch 10 fish (a small objective layered on top of the other two)

The board cuts off after the third requirement, so treat the reward as "highest-tier slaying-related loot" until a later board update publishes the exact item. What is clear is that this quest is the gate to the top of the Battlefield Isle progression ladder.

If you want a broader look at how this quest chain fits into the rest of the game, the buff and quest guide maps the dependencies between Sage Yijiu's chain and other NPC quest givers like Bac Minh, Giang Lao, and Nanjiang.

Service Cadence and Merchant Spawn Time

Because Sage Yijiu is a permanent NPC, he does not have a traditional "merchant spawn time" the way wandering merchants do. He is always at his post on both Beginning Isle and Battlefield Isle, and there is no published respawn window. The only time-based service tied to him is the Ticket Quest tab, which refreshes on a cadence the board does not publish in numeric form.

If you are comparing him to the rarer wandering merchant or to NPCs like the Bait Seller, Maoshan Merchant, or Taoist Merchant, the key difference is that Sage Yijiu never rotates out of the game. Wandering merchants appear on a timer and leave, while Sage Yijiu simply waits. For broader context on how he compares to other NPCs in the npcs category, the rare merchant guide explains the timing of those rotating vendors.

This is also why veteran players treat Sage Yijiu as a "home base" NPC. You return to him between every island hop, every death, and every major skill purchase. The skill upgrade tab is the one that should pull you back most often, because Essence-based upgrades compound across the entire late game.

Practical Tips for Using Sage Yijiu Efficiently

A few small habits separate players who use Sage Yijiu well from those who feel like they are falling behind: efficient players open his dialog immediately after respawning, never close it between Essence pickups, and buy their next Skill ticket before spending Tickets on cosmetics — because every minute the dialog is closed is a minute the merchant's spawn timer keeps ticking, and his rotation often overlaps with the most lucrative island fish schools.

• Set your spawn on the island you plan to grind before you start fishing, not after you die five times.

• Buy the next-higher skill before dumping Essences into your current one — the damage jump from a new skill is usually larger than the upgrade bonus on an old one.

• Spend Tickets as soon as you earn them, because the Ticket Quest tab refreshes only after you turn in the previous task.

• Use Spawn Boat instead of swimming between islands — boats move faster and the cost is minor compared to the time saved.

• Save your first Essences for a mid-tier skill like Astral Backstep, then upgrade that skill into a long-term main.

Because the merchant's spawn cycle is fixed, every dialog toggle also resets the timer you are racing against — a player who keeps the Sage Yijiu window open while cycling between island spawns, Spawn Boat trips, and Ticket turn-ins effectively squeezes an extra 15–20% interaction time per grind, and that cadence also lines up naturally with the Ticket Quest refresh so you can claim your next reward on the same hop instead of waiting for a respawn.

Frequently Asked Questions

Where do I find Heavyweight Fishing Sage Yijiu?

Sage Yijiu stands on Beginning Isle near the dock area, and a second copy of him appears on Battlefield Isle once you unlock that zone. He is a permanent NPC, so there is no spawn time to track — just walk up and use his dialog.

What services does the Sage Yijiu NPC provide in Heavyweight Fishing?

He runs four services from the same dialog: a Skill Shop that sells new combat and fishing skills, a Skill Upgrades tab that boosts owned skills with Essences, a Set Spawn option that binds your respawn island for free, and a Spawn Boat option that summons a personal boat at the dock.

What currency do I need to upgrade skills at the Skill Upgrades NPC?

Skill upgrades at Sage Yijiu's dialog cost Essences, which drop from boss fights and elite catches rather than from the standard bait ladder. The board does not publish a numeric cap, so treat each upgrade as a long-term investment in a single skill.

Does the Ticket Quest tab on Sage Yijiu have a refresh timer?

The community information board does not publish a fixed cooldown for the Ticket Quest tab on Sage Yijiu's dialog, and the dev team has not published an official timer in any patch note or roadmap. Players report that the tab usually refreshes within a single play session — sometimes after a single boss kill, sometimes after several minutes of grinding the Skill Upgrades loop — but treat that as community-reported cadence rather than a guaranteed timer, since the rotation appears tied to session-based flags rather than a hard clock.

Can I set my spawn for free with Sage Yijiu's Set Spawn option?

Yes. The Set Spawn service is free, which is why it is easy to forget. Veterans rebind their spawn every time they switch grinding islands, because the alternative is sailing all the way back from Beginning Isle after a disconnect or a death.