Kellan Joins Up (Promo Pack) [Outlaws of Thunder Junction Promos]

When Kellan Joins Up enters the battlefield, you may exile a nonland card with mana value 3 or less from your hand. If you do, it becomes plotted. (You may cast it as a sorcery on a later turn without paying its mana cost.)

Whenever a legendary creature enters the battlefield under your control, put a +1/+1 counter on each creature you control.