Bayle the Dread

Flying
At the beginning of your end step, if creatures you control have total toughness 10 or greater
draw a card. Then if creatures you control have toughness 20 or greater, untap each creature you control. Then if creatures you control have total toughness 40 or greater, each opponent loses half their life, rounded up.

CURSE YOU, BAYLE! I HEREBY VOW, YOU WILL RUE THIS DAY!