The other parts you need are simply a zero-cost sacrifice outlet and some effect that can place a +1/+1 counter on creatures as they enter the battlefield: Grumgully, Path of Discovery, Juniper Order Ranger, or Rhythm of the Wild for example
Its hard to oversell that kind of power, and while its not at its best in a Demon tribal deck, its still very hard to argue with
release date still isn't known
The likes of Waste Not, Harmonic Prodigy and Jeskas Will can help you get Kefka flipped quicker, by adding mana and doubling up on hand attack
If you can fold in some decent dwarves, like Magda, Brazen Outlaw and maybe the new Bag End Porter, youve got the potential for fun
When CARDNAME enters the battlefield, you may search your library for any number of cards named CARDNAME, reveal them, put them into your hand, then shuffle your library