Yoshi

{1}{t}: Flip Yoshi over, he becomes a 0/6 Egg creature with Hexproof until your next untap step, you may only use this ability whenever
you could cast a Sorcery
{2}{t}: Flip target creature over, it becomes a
0/6 Egg creature with Hexproof until its owners next untap step, it doesn't untap during it.