Purphoros, God of the Forge is another win condition in constant need of reprints, and putting the infamous Kefka Palazzon on it is an inspired choice
The tapped ability is meh: It doesnt work in EDH, but sometimes you can do the trick in Constructed decks to find and put another one in playits not that good there, either
You're going to need to buy at least 13 Happy Meals to get the whole set, and that's only if you've got the most fantastic luck, and only THEN if the packs include no repeats and 12.5 different combinations of cards
After combat, you could use the Reconfigure ability to unattach Rabbit Battery, leaving it untapped and ready to block during your opponent's turn
again, using a Lumra, Bellow of the Woods card as an example below