Aragorn, King of Gondor

When Aragorn, King of Gondor enters the battlefield, destroy up to 7 target creatures.
{2}{w}{w}: Put a +3/+3 counter on each creature you control. That creatures gain trample until the end of the turn.
{3}{w}{w}: Search in your library for a card called Anduril, Flame of the West. Put a +5/+5 counter on target creature.
Whenever a knight or a soldier enters the battlefield, put a +2/+3 on that creature.