Is this passage worded correctly?

FYI- Zethrindor is the undead wyrm and Iyraclea is the priestess. While the comrades, aided by Brimstone, fought against both forces in the hope of being able to escape, Zethrindor and Iyraclea faced one another in single combat, a titanic clash in which the undead wyrm emerged victorious. However, the powerful magic that Zethrindor had to use to defeat the priestess disrupted Kara’s spell to activate the magical gateway and resulted in the ancient enchantment not transporting the song dragon, Brimstone, Taegan, and Raryn all the way to the endpoint, but instead stranding them inside the gate. With their companions lost in the portal’s destruction, Dorn, Pavel, Will, and Jivex used the chaos of the dragons defeating Iyraclea’s remaining troops as a diversion to escape from the elven ruins.