Johnathan, god of flab

+1: create a 9/9 rhino creature token with after you block or attack with this creature sacrifice it.
-1: If you sacrificed a creature this turn populate that creature and it gets +X +X until end of turn where X is it's power and toughness combined
-20: All creatures you control get +X +X where X is the converted mana cost of all permanents on all battlefields combined