Would you consider this an "early game 2 card combo"?

Working on a mono-B enchantress deck and looking for interesting ways to close out games. Right now the main plan is the classic big mana mono black plan with [[Cabal Coffers]] and [[Crypt Ghast]] and whatnot generating tons of mana to drop a fat [[Torment of Hailfire]] or [[Exsanguinate]], but I also stumbled across a somewhat fitting infinite combo. [[Warehouse Tabby]] is already a nice card for a black enchantress deck but with [[Screams from Within]] it provides infinite creature ETB/LTB/death triggers and infinite enchantment ETB/LTB triggers. To pull it off you've got to have another X/1 creature on the board though, and the combo doesn't actually do anything on its own. You need another payoff, such as [[Wicked Visitor]] or [[Ashiok's Reaper]] in order to win the game or generate any value. So do you think it's okay for Bracket 3? Or is it a bit too much for 4 mana even though there's no payoff?

E: [Decklist if anyone is curious](https://moxfield.com/decks/PQUYhm5rZ0aEIOUjpTnM1A)