Jacar, The Bronze Arm

Whenever Jacar, The Bronze Arm enters the battlefield, you may destroy target artifact with
a converted mana cost less than or equal to it's
power.
Whenever Jacar attacks, put a +1/+1 counter on
it. You may pay {2}{g}, if this cost was payed with {g}{g}{g} it gains Crumple until end of turn,
otherwise it gains trample until end of turn.