Alistar, the Unchained

{2}{r}{t}: Alistar, the Unchained fights another
target creature. If a creature dealt damage this
way would die this turn, you may put X +1/+1 counters on Alistar, the Unchained, where X is
that creature's power.
Whenever Alistar, the Unchained attacks, it
gains trample until end of turn if its power is 10
or greater.