Multi-Spell

You are no longer limited to only one non-cantrip spell per turn. However, should you cast two or more spells in a single turn, only one of them can be of 3rd level or higher. This will allow spellcasting classes more options to aid themselves and the party at higher levels without a comparably sluggish per-round ability set, spending their solitary action on a bonus action spell. This would also apply to enemy spellcasters, leading to additional chaos and challenge.