Frozen Aether and Kismet are options if you want to push farther into this "slow everyone else down" direction
Fear of Infinity will be a good pull for any deck that uses discard mechanics, since you can keep returning it to your hand
Well, its hard for two-color cards to be high up on my list, as having two colors will naturally reduce the number of decks where its playable
Add commands, attributes, styles, and procedures that make sense for your game and help make it a cohesive playing experience
It's also an extremely useful card for anyone looking to play the tabletop game, so it's valuable in more ways than one
Kefka can also flip into an obscenely powerful flier that draws a million cards, so all in all this is a clear bomb