Karina of the Arrow

Hexproof, Reach
Whenever a player casts a spell, you get {e}.
Pay {e}: Create a treasure token.
Pay {e}{e}: Proliferate.
{t}, pay {e}{e}{e}: Permanents you control get
Hexproof until end of turn.
Pay {e}{e}{e}{e}{e}: Return a creature from a
graveyard to the battlefield.