So, thats a bit disappointing
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
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
Cards like Myrkul, Lord of Bones, Teysa Karlov, and The Meathook Massacre have amazing interactions with The Sibsig Ceremony
Cantrips just make decks more often than not, and as somebody who Cubes with Mental Note more than most Im very excited about Consider
Tempt with DiscoveryTempt with Discovery, Expedition MapExpedition Map, Sylvan ScryingSylvan Scrying, Hour of PromiseHour of Promise, Ulvenwald HydraUlvenwald Hydra, and Knight of the ReliquaryKnight of the Reliquary all let us tutor Gates from within our library