Roger, Armed Beserker

Trample
At the beginning of each combat step,
put a Rage counter on Roger, Armed Beserker.
Whenever Roger, Armed Berserker attacks, you
may pay {g}, if you do, he gets +X/+0 until end
of turn, where X is the number of Rage
counters on him. At the beginning of the next
end step, sacrifice Roger if he attacked that turn.