Mighty Stegosaurus

Double strike Armor 3 (This creature enters the battlefield with three armor counters on it. Remove an armor counter from it to prevent all damage that would be dealt to it this turn.) When Stegosaurus enters the battlefield or attacks, put a -1/-1 counter on up to one target creature. If that creature would die this turn, exile it instead. Whenever Stegosaurus has no more Armor counters sacrifice this creature. {flavor}“Even nature’s strongest walls can become nature’s fiercest weapons.”