from the vault mtg card list Angels - The Gathering (MTG) trading and collectible card game (TCG/CCG) From the Vault: Lore (V16)

And as you transform Sephiroth, you create an Emblem with his Blood Artist effect on

Some great targets for Rex, Cyber-Hound brain-counter include Arcanis the Omnipotent, Horseshoe Crab, Pili-Pala, and Tekuthal, Inquiry Dominus

One mythic can flood you with mana, bury your opponent in card advantage, and threaten to end the game on the same turn

With the wide variety of Demons in those colors, this wont be a problem

"Now that UB sets are regular parts of the game, do you think UB commander decks like Warhammer are less likely?"

Back then, the plane was being taken over by the Eldrazi - basically MTGs versions of the eldritch old gods - and the already horror-themed inhabitants were being warped into new, and substantially more tentacly, shapes