Here's one I'm unsure about:
vs.
They're both above-the-curve blue fliers for 3, but Illusory Angel is a lot easier to cast 'normally' (including on turn two with a Mox Diamond). They're also both great in a CoCo or Pod shell, but in the absence of a real self-mill archetype I worry that the support for Ruinator isn't there. It's such a sweet card though! I'm also not running Gravecrawlers, where I assume a yard-castable Zombie has even more advantages.
Mostly I want someone to tell me to either keep Ruinator in my Tiny Leaders deck, or that it's workable without a graveyard theme and I can cut the Angel for it.
I've been thinking about Ruinator a lot, and I think it will only see play in Pod decks. It's worth testing though. I'll put it in the list this weekend. Pod gets it on the board, then provides food for you to return it to the board.
Really I just want to pull off this chain: