Ordeal of Purphoros
From Heroes vs. Monsters
Card details
Enchantment - Aura
Uncommon
Enchant creature
Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice Ordeal of Purphoros.
When you sacrifice Ordeal of Purphoros, it deals 3 damage to target creature or player.
Artist: Maciej Kuciara
Card details
Enchantment - Aura
Uncommon
Enchant creature
Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice Ordeal of Purphoros.
When you sacrifice Ordeal of Purphoros, it deals 3 damage to target creature or player.
Artist: Maciej Kuciara
All versions of Ordeal of Purphoros