My Terrors could keep his threats off the board
You can fill your graveyard with Grisly Salvage and Mulch, draw cards with Night's Whisper and Harmonize, kill your opponent's creatures with Putrefy and Ob Nixilis Reignited, resurrect your dead creatures with Reanimate and Deadbridge Chant, or stymie your opponents with Arachnogenesis or Inscription of Abundance
If Gleeful Arsonist is no longer on the battlefield when its first ability resolves, use its power as it last existed on the battlefield to determine how much damage it deals
But this is also the part of the deck where you can express yourself with whatever favorite bombs you want to sleeve up unless your pet wincon is Phage the Untouchable, its probably got enough punch to carry a game from here
While this isnt as efficient as bringing them back to the battlefield, it does mean you get any cast triggers you need, along with ensuring you dont have to sacrifice anything along the way either
Like Science