Creatures and combat are essential parts of the best Cube experiences for my money, and keeping creatures in check should be one of blacks strengths
Cephalid Looter is the 1-card version, so its not distinct enough to have its own slot
When you lose the flip, Breeches deals damage equal to that spell's mana value to any target
Beyond Kefka, Umaro, Raging Yeti is another huge monster with a potent triggered ability
Im always happy to turn my card draw into additional creatures, which puts payoffs like Homunculus Horde and Jolrael, Mwonvuli Recluse high on my list
If you are just looking for the rainbow art style, then this card comes in a few bucks cheaper than the alternative However, if you are playing, then you need to consider your deck needs