• Type: Power
• Cost: 3
• Effect: Whenever you deal damage with an Attack, apply Ruin equal to that damage.

A cost 3 Power that, once placed, applies Ruin equal to attack damage dealt on every Attack. A 20 damage attack applies 20 Ruin, a 50 damage attack applies 50 Ruin simultaneously.

The combo with Finale (Exhausting attack dealing damage equal to Ruin) or Doomsday (29 Ruin AoE, lethal over HP) is central. High-damage attacks after Reaper Form auto-stack Ruin, turning Finale into a massive damage dump. Combined with Deathbringer (cost 2 big hit), Maul (Osty multi-attack), or Banshee Scream (33 AoE), a single attack stacks dozens of Ruin. Cost 3 is steep, so setting up Friendship (+1 Energy per turn) beforehand eases the burden.

Rating: 5/5 (top-tier Power auto-applying Ruin equal to attack damage; core of Ruin decks)

• Aim to place early in decks that spam high-damage attacks like Deathbringer, Reap, or Banshee Scream
• Once placed, ordinary attacks stack Ruin, bringing Finale's finish closer
• Cost 3 is heavy, so place after Friendship or when Energy is spare late game
• Combine with Doomsday (29 AoE Ruin) so previous-turn stacks plus Doomsday's 29 triggers lethal

• Finale: Exhausting attack with damage equal to Ruin; unleashes Reaper Form's stacks
• Deathbringer: Cost 2 big attack; after Reaper Form stacks Ruin equal to the massive damage
• Friendship: +1 Energy per turn; offsets Reaper Form's cost 3 for easier plays
• Doomsday: 29 Ruin AoE plus lethal; layer Doomsday on top of Reaper Form's Ruin for lethal
• Banshee Scream: Ethereal AoE 33 damage; after Reaper Form, all enemies get 33 Ruin too

• Necrobinder Ruin Stacking (A Tier)
• Necrobinder Reaper Form Doomsday Kill (Key Card) (B Tier)