Eternal Thirst [Magic 2015]

Set: Magic 2015 Type: Enchantment — Aura Rarity: Common Cost: {1}{B} Enchant creatureEnchanted creature has lifelink and "Whenever a creature an opponent controls dies, put a +1/+1 counter on this creature." (Damage dealt by a creature with lifelink also causes its controller to gain that much life.)