MTGs latest stream revealing cards for the Murders of Karlov Manor introduced Long Goodbye, which might have just wiped out a previous top deck
If a replacement effect (such as that of Leyline of the Void) causes any of the sacrificed creatures to be exiled instead of put into a graveyard, those cards aren't returned to the battlefield
You then win the game if you have eight or more different names among unlocked doors of Rooms you control
Plenty of Legendary-matters Commander decks will snap this up: Jodah, Kethis, Sisay Vizier of the Cryptolithright
At the beginning of combat on your turn, you may have Treasures you control become 3/3 Construct Assassin artifact creatures in addition to their other types until end of turn
Combined almost exclusively with Ensnaring Bridge, Grafted Skullcap provides a self-Howling Mine effect with a drawback lose your hand at the end of each turn