No matter what color the creature is, no matter if its an artifact or not, the creature will die (with or without regenerate)
Make Sure Enough Support Exists So you have an idea for a tribal deck
While it's a fun theme, it's pretty hard to imagine that level up will ever become a competitive archetypeit's just very slow and mana intensive for Modern
Four loyalty is a big chunk to get through, especially if it is early in the game
If youre playing vs Ifrit, you have the choice to block/trade with it, let it through, etc
Pauper started as a "home-grown" format on Magic Online that eventually attracted enough players that Wizards made a legality filter for it, and it grew and grew from there until now it's a legitimate paper tournament format