It's not an obvious fit for the deck - Tree of Perdition is not an assassin, after all
Jumpstart Booster Pack: 20 cards Booster Pack: 15 cards Beginner Box: Two Aang and Zuko tutorial decks (2) with 20 cards each (40), 8 theme packs with 20 cards each, 2 playmats, 2 spindown life counters, 2 learn-to-play guides, 5 double-sided tokens, 1 rules booklet Commanders, enjoy your Aang vs
Jerren, Corrupted Bishop requires you to be at exactly 13 life on your end step, which is a big ask in a format where people can drop you from a life total in the mid-20s down to sub-10 in one swing and thats if theyre not killing you outright
Orzhov control decks revel in this fact, controlling the flow of a game by prohibiting your opponents from controlling their key permanents and win conditions through a blend of targeted removal and board wipes
I think he shines at lower power tables where he has enough time to be cast and deploy his game plan of gathering heroes, drawing cards, and ending the game