Circle of Confinement (VOW-329) - Innistrad: Crimson Vow / Van Helsing's Holy Ward (Borderless)

When this enchantment enters, exile target creature an opponent controls with mana value 3 or less until this enchantment leaves the battlefield.
Whenever an opponent casts a Vampire spell with the same name as a card exiled with this enchantment, you gain 2 life.