ネクロバインダー

• Type: Attack
• Cost: 2
• Effect: Osty deals 12 damage. If Osty has already attacked this turn, this card costs 0.

Upgraded

• Cost: 2
• Effect: Osty deals 16 damage. If Osty has already attacked this turn, this card costs 0.

A conditional zero-cost attack that plays at cost 0 if Osty has already attacked. Its base cost of 2 is steep, but playing an Osty attack like Peck, Sic Em, or Snap earlier in the same turn lets you slam 12 to 16 damage for 0 Energy.

The April 2026 patch slightly nerfed damage (14/18 to 12/16). It still hits high efficiency once the cost 0 condition is met. It serves as the damage finisher in Osty multi-attack decks, and combining it with Rattle (damage scales with Osty attack count) followed by Flatten at cost 0 is a powerful combo. Bone Up tacks on +4 per hit for even more burst.

Rating: 3/5 (cost 0 finisher in Osty-first decks)

• Play a cost 0 Osty attack like Peck or Fetch earlier in the turn so Flatten costs 0
• The ideal combo is Rattle then Flatten at cost 0
• Playing it at cost 2 is mostly inefficient; build around reliably meeting the cost 0 condition
• 16 damage upgraded is plenty for a cost 0 card

• Rattle: Power scales with Osty attack count; use it to stack attacks before Flatten at cost 0
• Peck: Cost 0 Osty attack that meets Flatten's cost 0 condition
• Sic Em: Cost 1 Osty attack plus Summon, meeting the condition so Flatten plays at cost 0
• Bone Up: +4 per Osty hit, pushing Flatten to 16 to 20 damage

• Necrobinder Osty Multi-Attack (S Tier)