And Modalism doesn't deny the Deity of Christ while that doctrine is fatally flawed.This is an assertion asserted without any actual evidence. Formulated in 381? You've got to be joking. The term was coined in like 150. The Didache was written in 100 which includes triple baptizing in the name of each person in the Trinity. We have Trinitarian writers arguing with Modalist throughout the first three centuries. I'm not saying Modalism wasn't early. It was definitely earlier than Arianism, but the Trinitarian narrative presented above is nothing but pure fantasy.