Aethion Archon of Despair

0: Until the start of your next turn, for each creature that dies, gain a life, for each creature that is exiled, place a loyalty counter on Aethion
-0: Target permanent you control gains Hexproof and Indestructible until the start of your next turn detain that creature and another target creature
-10: Gain an emblem that says "When you spend life instead of mana for spells and abilities, spend one life instead of two.".