Perrieg, the Pulverizer

(Perrie, the Pulveriser)
When Perrieg enters the battlefield, put a shield counter on target creature. (If it would
be dealt damage or destroyed, remove a shield counter from it instead.)
Whenever Perrie attacks, target creature you control gains trample and gets +X/+X until
end of turn, where X is the number of different kinds of counters among permanents you control.