Liliana of the Veil For a long time, Liliana of the Veil was a $40-50 staple card across all Magic formats, and now it sits around $10
Kozilek, the Butcher of Truth 2.5 A refuel on cards is nice but Kozilek is quite a vulnerable threat
Wheel of Misfortune is my favorite of the four for its neat damage subgame
Both commander choices are great for the deck, and unlike most cases, where there's a clear "best" commander, the choice between Tidus and Yuna is completely up to personal preference (although Yuna is the stronger of the two)
This solution made morph one of the best Limited mechanics wed ever seen, and also made Khans of Tarkir one of the all-time best Limited formats in Magics history
Stellas abilities may not be the most original in implementation, but she is cheap to cast, immediately impactful and has an infinitely high power ceiling