Yuumi
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Good (7/10)
High Investment Required
Epic Relics
Paid Relics
Players disagree about Yuumi's playstyle. Some consider her attachment mechanics highly engaging and powerful, while others find her gameplay repetitive and overly reliant on specific Epic and Paid relics to function in high-difficulty content.
Attached Aggression
Reduces Yuumi's cost based on allies in play. When played as an attachment, it bypasses the downside of dealing 3 damage to allies.
Grants Scout. The recall penalty at round end is completely ignored while Yuumi remains attached to a unit.
Generates a 0-cost targeted spell every round, which consistently triggers Yuumi's Fated keyword and her 4-star Barrier effect.
Strategy
This is the premier build for maximizing Yuumi's attached playstyle. Disciple of Shadows allows for a Turn 1 deployment by leveraging her starting Poros. Galeforce provides relentless offensive pressure through the Scout keyword, while Perfect Hex Core ensures constant stat scaling and defensive utility via burst-speed Barriers.
Subtype Swarm
- Provides essential cost reduction to establish Yuumi early.
- Enables multiple attacks per round without the risk of Yuumi returning to the deck.
Grants +1|+1 and Overwhelm to all allied units with a subtype.
Strategy
This build capitalizes on the high concentration of Poros and Faes in Yuumi's deck. The Beast Within transforms her small generated units into significant threats with Overwhelm, allowing the deck to go wide and push substantial Nexus damage alongside Yuumi's primary attached unit.
Husk Scaling
- Used here to intentionally destroy allied Poros upon playing Yuumi unattached.
Converts the destroyed Poros into Husks that carry Yuumi's stats.
Provides valuable keywords to the 1-cost Husks and Poros.
Strategy
Designed specifically for her 6-star power. By playing Yuumi unattached, Disciple of Shadows destroys the starting Poros to generate Husks. The 6-star power buffs these Husks to match Yuumi's stats. When the next unit is played, it consumes the massive Husks, resulting in extreme stat scaling that can secure a victory by Turn 3.
Accessible Attachments
- The core engine for providing the Scout keyword.
Grants Overwhelm, which successfully transfers to the attached unit.
Grants Spellshield, protecting the attached unit from removal.
Strategy
For newer accounts lacking Epic relics. Galeforce remains essential for offensive tempo. Because many Rare relics with 'Play' or 'Summon' effects do not trigger when a champion is attached, Common relics that provide static keywords are utilized instead, as these keywords directly transfer to the host unit.
Other Relic Options
Provides crucial protection against hard removal, preventing the attached unit from being recalled or destroyed, which would reset Yuumi's accumulated stats.
Can be utilized effectively if playing an unattached Yuumi build, generating a Rally upon leveling up.
Avoid relics that rely on 'Play' or 'Summon' triggers (such as Golden Spatula or Star Gem) if you intend to use Yuumi's Attach mechanic, as attaching does not count as summoning the champion to the board.
Constellation
Yuumi requires significant constellation investment to tackle high-difficulty adventures. While her early nodes provide essential Poro generation for board presence, her true potential and survivability are locked behind her 4-star and 6-star upgrades.
We Got This
Allies have Fated.
So Many Friends
+1 Starting Mana. Game Start: Summon two random 1 cost Poros.
We Got This II
Allies have Fated. When you target a Fated ally, grant it an additional +1|+1.
Phalanx
When you target an ally, give it Barrier this round.Review
This upgrade fundamentally changes her survivability. Granting Barrier upon targeting an ally synergizes perfectly with Perfect Hex Core, allowing for consistent, burst-speed protection that easily disrupts enemy attacks and preserves key units.
Manaflow
Game Start: Get a mana gem.Review
The extra starting mana is critical for her tempo, allowing her to establish a board presence early without strictly relying on Disciple of Shadows for cost reduction.
The Power of Friendship!
Round Start: Grow all allies to the Strongest ally's stats this round.Review
Transforms her win condition. By synchronizing the board's stats to the strongest ally, it enables unique strategies—such as the Husk build—where consuming a massive Husk instantly scales the entire board for a decisive early victory.
Gameplay Tips
- Bypassing Negative Keywords
When Yuumi attaches to an ally, she only transfers positive keywords. Negative effects from relics, such as the recall penalty from Galeforce or the Ephemeral tag, are completely ignored. This makes these relics exceptionally powerful on her.
- The Small Stuff Advantage
Yuumi excels in adventures featuring the 'Small Stuff' mutator (which sets unit stats to 1/1). Because her attached stats are applied as a buff on top of the base stats, her units remain massive while the enemy board is severely weakened.
- Avoiding Obliteration
Be extremely cautious against encounters with Obliterate or Entomb effects, such as the Lissandra adventure. If the host unit is obliterated, the attached Yuumi is permanently destroyed as well. In these specific matchups, it is often safer to play Yuumi unattached.
- Cost Reduction Mechanics
Disciple of Shadows is the premier relic for Yuumi because playing her as an attachment bypasses the relic's area-of-effect damage to allies, while still granting the massive cost reduction based on the number of units in play.