@JeremyECrawford If Slow delays a spell being cast, does finishing the spell require concentration? Is the slot lost if it's not finished?
— Armando Doval (@armando_doval) February 28, 2017
— Jeremy Crawford (@JeremyECrawford) February 28, 2017
@armando_dovalThanks! In that case, does the caster lose their concentration on a previous spell immediately? Yes.
— Jeremy Crawford (@JeremyECrawford) March 1, 2017