Snorlax

gigantimax {w}{w}{w}{3}:
(if this creature is not gigantimaxed, you may pay {w}{w}{w}{3} and this creature becomes gigantimaxed. when you gigantimaxed this creature, double its power and toughness)
when Snorlax enters the battlefield, destroy target artifact
when you gigantimax Snorlax, destroy all artifacts and enchantments opponents control