homebrew feat: arcane dmg spells deal one die more dmg. Gamebreaking?

@yusakuasano homebrew feat: arcane dmg spells deal one die more dmg. Gamebreaking?Overpower?Ok? Underpower? tricky to balance – good at low level, weak at high level #WOTCstaff

— (((Mike Mearls))) (@mikemearls) December 20, 2016