mtg summer magic cards GEM MINT BGS 9.5 Magic/MTG Badlands, ULTRA RARE!!! You and permanents you control gain hexproof from blue and from black until end of turn Summer Magic / Edgar (SUM)

Evasive Voltron decks like Daxos of Meletis

You'll put a time counter on it at the beginning of your upkeep, and once you have at least one you'll be able to Time Travel (or proliferate) them to either of your hearts' content!

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

The simple rule is, if the card doesnt say you can, then you cant. How Can You Return Cards from Exile

Corrupted Shapeshifter

It can hold up to 7200 standard size cards with or without sleeves