If your Deino evolution line gets disrupted early or you never draw into Mega Absol, the whole plan slows down considerably
Creating a simple cost threshold wont work because cards that are near the threshold and constantly going over and under would be nightmarish not just for us, but for players
Tannuk, Steadfast Second has a familiar Sneak Attack-like ability, not unlike Purphoros, Bronze-Blooded, and it should get people brewing around massive artifacts and red creatures
Ideally, your opponent will be half-dead before their gameplan has even started
Crypt Ghast Crypt Ghast: For when you need a Bubbling Muck but also need to be able to reanimate it to go off again
The rules for said step read as follows: Second, the following actions happen simultaneously: all damage marked on permanents (including phased-out permanents) is removed and all until end of turn and this turn effects end