S.A.M, Last of the Cavalry

Flying, Trample

At the beginning of each upkeep S.A.M get a combustion counter, then if it has six or more remove them all and S.A.M deals damage to you equal to the amount removed this way.

S.A.M gets +1/+1 for each combustion counter on it.

{x}, Remove X combustion counters from S.A.M, X can't
be less than 5: S.A.M deals X damage to up to four creatures or to target opponent.