It seems like a reasonable game plan which has decent inevitability
Use a website like Yard Sale Search to see if any garage sales in your town will be selling Magic cards
This list is very dependent on big mana, you need to hit five/six/seven mana as soon as possible, and this deck could use some more mana dorks to make sure that happens, especially being in three colors
Purphoros, God of the Forge is another damage dealer in this vein, but is far more specific to token based strategies, with Terror able to slot into many more archetypes and provide meaningful removal to boot
8: Eutropia the Twice-Favored - Theros: Beyond Death There was not a lot of Theros: Beyond Death that really excited me, but Eutropia manages to do two very exciting things: (1) be deceptively powerful, and (2) be a Simic commander that is perfectly fair