A large part of the dark races army was wiped out after the tier 7 spell. The elves who had their morale down were screaming, and some even acknowledged Arthur as that elf from the legends.
That was the only way to explain the amount of power they witnessed, as well as affinity with multiple elements, just like in the legend.
All the troops saw that most of the army was now dead, so they prepared their own attack.
The generals were the first to recover from the shock as they yelled, "everyone, attack!"
A stream of elves wearing plate armor rushed towards the dark race army. Not only by foot, but with mounts just like the ones they used for the carriages.
Arthur checked his status after that spell, and he saw that most of his mana was now gone. The tier 7 spell used a lot of mana, and it wasn't something he could cast over one time.