Titan of Berserk

Cast Titan of Berserk only before the combat
damage step.
Flash, Trample
{r}: Titan of Berserk gains +1/+0 until end of
turn.
When Titan of Berserk enters the battlefield,
target creature gains trample and gets +X / 0
until end of turn, where X is its power. At the
beginning of the next end step, destroy that
creature if it attacked this turn.