I especially like how much control you have over when this transforms because it only triggers off spells that cost 4 or more, or you can put counters on the Emperor so you just need to trigger it once or twice to flip
EDIT: Oh, and in GLC this would just be dumb LMAO
Early on - before spoiler season started - Wizards of the Coast revealed that MTG Lost Caverns of Ixalan includes a reprint of the MTG Land card Lost Cavern of Souls, as well as Mana Crypt (though the latter is not becoming Standard legal - can you imagine?)
Some of them, like power, toughness, or mana value should be relatively known terms for players whore already at this point
Sure, it can be a (painful) card draw engine, but it can also be a potent weapon
If youre diving into this set for Commander, you really cant go wrongjust pick your favorite character and bend the table to your will