Portal Mage [Wizard]: It will only mess up one creature, but that could be useful, especially if you have it attack something with indestructible or deathtouch
Ichor Wellspring ain't no proper egg in that sense (it has no built-in sacrifice ability), but assuming your deck hangs out with an entourage like Braids, Arisen Nightmare or Daretti, Scrap Savant and you can reanimate artifacts, you can draw a lot of omelets with this one
Getting there is a lot easier than it seems, thanks to Eldrazi Temple and Ugins Labyrinth which get you there a lot faster
An absolutely amazingly rendered expression of absolute pain
How likely are you to need your mana next turn
I've already covered the fight cards, which will be the primary way we deal with opposing creatures, but we still gotta pack artifact / enchantment / land hate, plus a board wipe or two