Entropic Beast

Trample, surgebane (This creature can't be the target of spells or abilities you or your allies control.)
Entropic Beast can't attack unless you or defending player has rolled a six-sided die this turn.
Whenever a player rolls a six-sided die, flip a
coin. If heads, Entropic Beast gets +1/+0 until
end of turn. If tails, Entropic Beast gets +0/+2 until end of turn.