mtg cards like polymorph — Rulings, Legalities & Similar Polymorph list suggestions?

The ability to copy only an Ally creature is narrow enough that it's not able to be played in anything but the most dedicated Ally deck

Its a flier thats hard to ignore, and its good at being aggressive and controlling

General question 10 1508 June 30, 2017 Alakazam Gold Star Color Variation Error

Those are nonfoils, though, and represent how were going to get prices on regular copies so very low

Invasion of Kamigawa Invasion of Kamigawa Battle Siege (As a Siege enters, choose an opponent to protect it

Ruby has always been the most aggressive ink colour in the trading card game and the latest set certainly doesnt see this changing