Corrosive Toad

Ravenous (At the start of your turn, you can
sacrifice a land: This creature becomes sated
until the start of your next turn. At the beginning
of your end step, if this creature is not sated, lose
life equal to its power)
Whenever this creature deals combat
damage to a player, if its sated, destroy
target artifact or enchantment.
Its favorite snack is society.