While there aren't enough Ninjas in Magic to make full-on tribal, being able to cheat Yuriko, the Tiger's Shadow into play with commander ninjutsu for just two mana repeatably makes it a bit like the infamously broken Derevi, Empyrial Tactician
In addition to the Illusion-type battle destruction prevention effect, Chimera can reduce a battled monster's attack points to zero and negate its effects, meaning that it can deal at least 3100 additional points of battle damage after its first attack
Its the ultimate nostalgic Charizard Pokmon card and any lucky owner should be proud to have it in their collection
Just get the grass snake on the bench, and a Celebi ex in play, and youre set to decimate your opponent
Building a deck around Mew exs damage output wont bring consistent results
Clearly you want this in an artifact-themed deck, especially if youre sacrificing them, but treasure themes also help it along, as does any kind of resource token deck like Blood tokens or Junk tokens