@JeremyECrawford Creatures that have a ability that says: "as concentrating on a spell" is there a different between it & real concentration
— René Christiansen (@Rugholm86) March 21, 2016
A creature can't concentrate on such an ability and a spell at the same time. #DnD https://t.co/d1rxh8SlSc
— Jeremy Crawford (@JeremyECrawford) March 29, 2016