SOUL IMMOLATION
what a card name, and what a piece to match

Honestly if you can get your vivid count to 3 and look at 3 red cards and pick one to cast same turn thats pretty sweet, its a very unique idea!

This is what I'm building too! Except 47 of my nonland cards are izzet to almost guarantee I hit two cards on the trigger, I didn't think about off color tokens helping to dig further in!

And my favorite naga became a snake

To me a B1 deck is a theme so niche it may not even be possible, like a mono blue deck where none of the cards have the color blue in the art box.