Black complements white in card advantage and creature recursion and adds to reds aggressiveness with life drain effects and unconditional removal
While not strictly required to have Giada around, it makes winning the game that much easier with how many counters it can provide
Mill is a very popular archetype in EDH, and The Water CrystalThe Water Crystal fits perfectly there...And that's probably its only home
Additionally, if you do choose to run Weezing/Muk over Gardevoir for your Mewtwo ex deck, you will almost certainly need the Koga Trainer Card
Most of them have big bodies with great enter-the-battlefield effects, and flash ultimately helps protect them from removal and functionally gives them haste if you cast before your turn
The art is vibrant and cartoony, showing off this legendary Ostrich thing's super speed in a way I really love