Kellan Joins Up - Outlaws of Thunder Junction - 354

Legendary Enchantment

Mana Cost: {G}{W}{U}

When Kellan Joins Up enters, 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 you control enters, put a +1/+1 counter on each creature you control.

Rare · Outlaws of Thunder Junction · #354 (OTJ)

Illustrated by Wylie Beckert