Can u counterspell a magical triggered trap, or if sets off something like stone wall(spell) can it be used on 1part/all. @JeremyECrawford
— redwoodguardian (@redwoodguardian) March 29, 2017
Counterspell says in its Casting Time entry that you cast it in response to a creature casting a spell. A trap isn't a creature. #DnD https://t.co/eDtALVpfwz
— Jeremy Crawford (@JeremyECrawford) March 30, 2017