Centiskorch

gigantimax {x}{x}{r}{g}{g}:
(if this creature is not gigantimaxed, you may pay {x}{x}{r}{g}{g} and this creature becomes gigantimaxed. when you gigantimaxed this creature, double its power and toughness)
when this creature dynimaxes, create X 2/2 centipede creature tokens with deathtouch and "when this creature dies, destroy target artifact