Exhaust means you can only do it once per game, but blinking Loot, turning it into soup with Agatha's Soul Cauldron, or recasting him solves this problem
This is really strong in Red discard-draw builds in Commander like madness
Creatures : Viscera Seer, Krosan Tusker, Golgari Guildmage, Charnelhoard Wurm, Deadwood Treefolk, Hissing Iguanar, Pyreheart Wolf, Falkenrath Noble, Flayer of the Hatebound, Bone Shredder, Shriekmaw, Indrik Stomphowler, Lyzolda, the Blood Witch, Savra, Queen of the Golgari, Anger, Sakura-Tribe Elder SekKuar is particularly nice with effects that sacrifice creatures, since you get the effect plus you get a bonus 3/1 creature to go along with it
Conclusion Exxaxl: Overall Im quite happy with the set
Cards like Myrkul, Lord of Bones, Teysa Karlov, and The Meathook Massacre have amazing interactions with The Sibsig Ceremony
So, thats a bit disappointing