Bob The Penguin

+1: Summon a 1/1 Penguin creature token and each time this creature deals damage to a player you gain 1 life
-4: Sacrifice X Penguins then summon X 1/2 Penguin creature tokens with renown 1 and each time this creature deals damage to a player you gain 1 life
-X: Summon X 3/2 Penguin creature tokens with renown 1 and each time this creature deals damage to a player you gain 1 life then take X damage