If you have an engine in play already, then hitting creatures at all is good it doesnt matter what they are if youre going to sacrifice them for effects
These are just a few of the possibilities that Kiki-Jiki opens up to you if you're interested in 'degenerate' infinite combos which you definitely should be
Hes one of the best mythic rare MTG cards for artifact strategies, and while Urza is a solo powerhouse, you can also explore the best Partner Commanders in MTG if you want to experiment with multi-color synergy
You see, the elves of Lorwyn are a little obsessed with perfection
Enchantment Elephant Grass Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) Black creatures can't attack you
The first few options that sold me on this deck idea were the upgradability of creatures like Bearer of Silence, Sky Scourer, Dimensional Infiltrator, and Mist Intruder as resurrection targets for reasonably-sized fliers