Grommash Hellscream

First Strike, Trample, Haste, Menace.
Whenever Grommash Attacks, All other creatures
you control become X/Y until end of turn where
X is the highest power among creatures you
control, and Y is the highest toughest among all creatures.
Whenever Grommash enters the graveyard from
the battlefield, All of your creatures fight
target player's creatures.