Not only are their abilities interesting, but theyre also providing support to an archetype that didnt really exist before
Mana Vault Mana Vault is part of a nasty 2-card combo: Mana Vault plus whatever busted 4- or 5-mana spell you want to play on turn 2 strong enough to be banned in Legacy and even restricted in Vintage
Moreover, if youre desperate, you can actually cycle Sphinxs Revelation for one less mana, and, more importantly, its miles better at every additional amount of mana (itd be close at six except that the three life is a pretty big deal)
Its not too surprising to see Twinflame Tyrant on the list, as its one of the chase mythic rares of the set
Wheeling again
While we've seen Gisela, Blade of Goldnight's unique take on doubling damage and Obosh, the Preypiercer doubling damage from odd mana value sources, this is the first time we've gotten a purely mono-red damage doubler in the command zone