Sacrifice after III.) I For each player, exile up to one other target enchantment or creature that player controls until Vault 13 leaves the battlefield
Josu Vess is fine value as a 4/5 with menace, but really blows up if you can hit its kicker cost
It draws cards at a rate that Rowan, Scion of War is happy with, and you can pay a lot of life when you have the mana to untap it
For Worldpurge, that means blinking a bunch of cards out of play, resolving this 8-mana sorcery, then being the only one left with a board when your cards re-enter
Theyre entirely tied to the flavor of D&D, so they wouldnt really fit anywhere else
Vile Rebirth is a great sideboard card for a problem that does not exist