Question about the War Mage: if you use Arcane Deflection, you cant cast spells the next turn except cantrips. Can you re-use the effect of an already casted spell, mainteined through concentration, or it is considered “casting” again that spell?No
— Mike Mearls (@mikemearls) March 2, 2018
No, you can’t re-use the effect? Or no, it’s not considered “casting” again that spell?
Can you use arcane deflection if you already casted a spell that turn?
It says “When you use this feature, you can’t cast spells other than cantrips until the end of your next turn”, so maybe the feature only cares about what happens after you use it.