mtg jeleva commander deck cEDH] you may cast an instant or sorcery card exiled with it without paying its mana cost. Jeleva, Nephalia's Scourge #194 (Damaged)

Your best win condition is to stick an Unholy Annex and simply run them out of resources, but it won't be easy to keep a Demon in play (and if you do, you just win anyway) so preserving your life total is critical

Tarkir: Dragonstorm and Edge of Eternities also had some really powerful designs, and while they weren't my favorite Limited environments, they definitely added some great cards to Standard (honorable mention, Consult the Star Charts)

Can you regenerate indestructible creatures

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Black Roshan, Hidden Magister For some reason, it seems like Wizard s way of helping under-supported creature types is to just turn random creatures into those creature types instead of taking the time to print real support