Torbran increases the damage inflicted by red sources, the Devil inflicts a point of damage to any target when a player sacrifices a permanent card, and the Goblin Sharpshooter with great design, of course inflicts a point of damage with tap but can be untapped with any creature that dies
Imagine templating Spellbinders effect as Capture 3 Target opponent reveals their hand
This includes Scavenger's Talent (food tokens, mill, reanimate), Savor (removal, food tokens), Pawpatch formation (removal, card draw, food tokens), and Cache Grab (mill, food tokens, return a permanent from the graveyard)
You'll make that mana to cast your three cards, nice
If you dont get enough non-humans then youre just playing Boros humans with basically no commander