The Meld Hound

Unknown Event (UNK) #RZ06k · Rare · Legendary Creature — Dog

Mana cost: {3}{U}{B}{R}

Whenever you cast a creature spell, exile cards from the top of your library until you exile a creature card. It melds with that spell. You may give the combined creature spell a new name. (The combined creature spell has the abilities and creature types of both creatures, their combined powers and toughnesses, and so on.)