Youd hope wed have some other benefit for playing Sidequest: Card Collection, but the ability to sometimes transform into a 4/4 flying vehicle
The Filigree Sylex handles early-game pressure well, can get you out of trouble in a pinch later, and acts as a win condition if unneeded
Teferi, Who Slows the Sunset can help to get a prize artifact into your hand more quickly, tap an opponents artifact, untap your own
Top Cards Madame Null, Power Broker lets Jenova act more like a single-target Ouroboroid, while +1/+1 counters synergy cards like Hollowmurk Siege and The Ozolith let you pile innumerable buffs onto your Creature, Mutant or not
This can be a major problem for its survivability in combat, as well as for any synergies
I have also added the ability to create Hybrid cards, which you can find more detail about below