Suwako, Lord of Curse Gods.

Whenever you gain life, you may pay {b}and 1 life. If you do, create a 2/1 black Snake God token with "Whenever this creature attacks a player enchanted by an Aura Curse, gain 1 life."

Whenever you lose 1 life, you may pay {w}{w}. If you do, create a 1/2 white Frog token with "When this creature dies, deal 1 damage to each player enchanted by an Aura Curse."