Ordeal of Heliod THS/25

Set: Theros
Collector Code: THS/25
Name: Ordeal of Heliod
Type: Enchantment — Aura
Oracle text: 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, you gain 10 life.
Rarity: Uncommon