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1-Yoku is the core in-run resource of dungeons in Soulbound: Online. It powers the relic system inside a run, and it is also the energy you spend to claim dungeon rewards.
1+Yoku is the in-run resource of dungeons in Soulbound: Online. It drives the relic system inside a run. It was also once an energy cost you paid to open reward chests, and that part of the mechanic has since been removed from the game.
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33 Yoku And Relics
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5-As you defeat enemies and complete objectives in a dungeon, Yoku crystals drop and fill your relic experience bar. Each time the bar fills, you choose one of three relics to add to your build. In this sense Yoku is the relic experience of a run: more Yoku means more relic picks and deeper synergies before the run ends.
5+As you defeat enemies and clear objectives inside a dungeon, Yoku crystals drop and fill your relic experience bar. Each time the bar fills you choose one of three relics to add to your build. In that sense Yoku is the relic experience of a run: more Yoku means more relic picks and deeper synergies before the run ends. Which relics you are offered is shaped by your equipped weapon and abilities and by the upgrades you have already bought.
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7-Yoku Energy And Chests
7+The Retired Yoku Energy Cost
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9-Claiming a dungeon's reward chest costs Yoku energy, shown as a blue bar beneath your energy meter. Higher dungeon tiers cost more Yoku per chest, so Yoku acts as a soft daily limit on how many high-tier rewards you can bank. In the live build, players receive a free allotment of 800 Yoku each day, and contracts can grant additional Yoku when you need more to keep opening chests.
9+Yoku used to double as a third energy bar alongside health and stamina. Opening a dungeon's reward chest cost Yoku energy, scaling with difficulty, and the pool refilled daily and could be topped up through contract rewards and consumable items. That cost has been removed: dungeon chests are now claimed for free, and there is no daily Yoku allowance to plan around. Older guides that tell you to ration Yoku between chest openings describe a version of the game that no longer exists.
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11+Several item names still carry the word, including Yoku Forge, Yoku Shard and Yokulite, along with Yoku catfish and the scales crafted from them. Those are ordinary materials and equipment and have nothing to do with the retired energy bar.
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1113 Refining Yoku
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13-Rare Yoku can be refined at the Chemistry Lab among your crafting stations, tying the dungeon resource back into base crafting and the wider economy.
15+Rare Yoku can be refined at the chemistry station among your crafting stations, tying the dungeon resource back into base crafting and the wider economy.
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15-Yoku amounts and the daily allotment are drawn from the live browser build and the studio's dev updates, and may be tuned during Early Access.
17+Health and stamina are the two energy types the Early Access build actually tracks. Stamina is spent on gathering, at three points per action, and refills passively over time.