WriteToLive Deckling

In a pinch, Murder would do instead of Fatal Push

Maybe even Terramorphic Expanse if on a budget instead of fetches?

I would focus more on Scorpion God and go into RB with a splash of White for Grind / Dust. He's a very strong and under-realized card that can help you nerf other opponents while still adding power. A decklist for this might look like...

3x The Scorpion God, 4x Soul-Scar Mage, 3x Harsh Mentor, 4x Bone Picker, 4x Fatal Push, 4x Abrade, 4x Magma Spray, 2x Grind / Dust, 4x Torment of Venom, 4x Walking Ballista, 3x Evolving Wilds, 4x RB Bicycle Lands, 3x Ifnir Deadlands, 4x Survivors' Encampment, 3x Ramunap Ruins, 3x Mountain, 3x Swamp, 1x Plains

You'll also want 2 Crook of Condemnation and Claim / Fame in your sideboard to return cards and give them buffs. Ballista is optional in the deck, but I'd focus more on the damage abilities. You could also go more with Insult / Injury or the Red -1/-1 removal spell in Hour, but as it is, it's all over the place and I fear would get crushed at an FNM.

You definitely want to make room for Winding Constrictor and Walking Ballista. They're great in this kind of deck. Solidarity of Heroes is also a fun card that doubles +1 counters.

Gaddock Teeg seems to be missing from this list. You have numerous ways to cheat cards onto the field. Might as well lock everyone else out. Also, the artifact creature that says you can't cast more than 1 non-artifact spell could be interesting for you.

Are you building this for Standard or Modern? Because as it stands, it's not standard legal. As for Modern, you'll need ramp spells to get you there faster and buff harder. It could be viable, but you'll need those spells like Cultivate, Harrow, etc. to get there.