Power Stone

Creatures entering the battlefield under your
control enter with an additional +1/+1 counter
on it.
{2}{t}: Choose up to one target creature. Put
a +1/+1 counter and a counter of your choice
from among Flying, First Strike, Trample, or Vigilance on it.
{4}{t}: Destroy target Artifact or Enchantment.
{6}{t}: Destroy target nonland permanent.