That's so cool. I didn't even consider finishers like the ones you suggested. I did some research, and
Tree of Perdition is even more nutso than you described in this deck. The rules text for it on Scryfall (
https://scryfall.com/card/emn/109/tree-of-perdition#rulings) state that when someone's life total is altered by the tree, they gain/lose the respective amount. I can activate
Tree of Perdition to drop someone to 13. Then, the next turn, I can drop
Tainted Remedy, activate
Tree of Perdition again (on the same player) and, as long as they had 26 life when I first activated it, I can just kill them. My inner Timmy squeals with glee. I also like
Benevolent Offering,
False Cure, and
Triskaidekaphobia. I don't like
Congregate, since it only does something with
Tainted Remedy/
False Cure is in play and
Ayli, Eternal Pilgrim requires
Tree of Perdition to do really well. Not to mention, this deck doesn't really have creatures it wants to sacrifice.