77IM Explorer!!! Supporter Sep 8, 2015 #11 PHB p.205, "Combining Magical Effects," could imply that since the two identical castings are simultaneous, the effects do not stack, and a creature affected by both suffers the higher final damage total.
PHB p.205, "Combining Magical Effects," could imply that since the two identical castings are simultaneous, the effects do not stack, and a creature affected by both suffers the higher final damage total.