Is this small passage worded and structured properly?

Soon thereafter, Dor'crae and Valindra entered Gauntlgrym in pursuit of the five comrades along with a large force of Ashmadai. Before the Ashmadai moved to engage the group and to protect themselves from the dwarf ghosts, Valindra used a magical scepter to summon the mighty pit fiend Beealtimatuche from the Nine Hells to serve her will. Meanwhile, the companions began the process of placing the ten bowls in their correct locations throughout the city while battling the primordial’s minions. During the fighting, dwarves from Icewind Dale and the city of Mirabar (who had also been visited by dwarf ghosts) arrived in another part of Gauntlgrym to help seal the primordial.