Ordeal of Erebos

Enchantment — Aura — {1}{B}

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 this Aura.
When you sacrifice this Aura, target player discards two cards.

Rarity: uncommon

EDHREC rank: 23492