Hueso

Bone is a 0-mana Attack card that deals 15 damage to all enemies. As Mortaccio's starting weapon, it offers zero-cost AoE damage that never runs out of resources. Bone is a terminal card — it has no evolution — yet it consistently ranks as one of the best 0-cost cards in the entire game due to its universal board impact.

• Damage: 15 to all enemies (AoE)
• Mana Cost: 0
• Color: Red (Attack)

Bone has no evolution. Being a terminal card means all gem and arcana investments stay on Bone permanently, allowing you to focus enhancement resources entirely on maximizing its performance.

• Chain Link arcana: Each Bone activation generates a Trigger stack, and Chain Link amplifies Trigger-based damage multiplicatively — one of the most powerful combos in the game.
• 0-cost trigger gems: Any gem that fires an additional effect when a 0-cost card is played turns every Bone cast into a multi-effect activation.
• Whip pairing: Running both 0-cost AoE cards ensures consistent board-wide damage even on turns with no mana generation.

Mortaccio holds Bone as his starter and has a passive that accumulates Bone stacks for extra effects — he extracts the maximum value from every cast. Other Crawlers can still benefit greatly from Bone's consistent zero-cost AoE.

The premier 0-cost AoE damage source and combo trigger. Functions as both a standalone damage card and an engine piece for Trigger-based combo chains.

Zero-cost AoE with no evolution cap is the definition of an always-useful card. With Mortaccio and Chain Link, it becomes the backbone of one of the strongest archetypes in the game.