If you can find a way to circumvent that, youll find it very easy to get in for damage
Legality depends on the tournament format -- Mephidross Slime can be legal in some formats and banned or restricted in others
This means you could be unlucky and get no EX cards or roll lots of duplicates that make your collection tough to battle with
Though the death clause is a fine consolation prize, it's disappointing in a format as powerful as EDH." After browsing her decklists, I totally get it now
If you do, until this creature is turned face down, it becomes a copy of that creature, except it has "At the beginning of your upkeep, you may turn this creature face down." Morph Morph Creature - Shapeshifter Stifle Effects (CTRL to add secondary) Stifle Targets Acererak the Archlich When Acererak enters, if you haven't completed Tomb of Annihilation, return Acererak to its owner's hand and venture into the dungeon
On pure rate I don't think Jace quite gets there, but if you're doing some serious graveyard stuff it's hard to imagine a better planeswalker for your deck