Mana Poisoning (Part 1)
By fusing all of their eyes into one, the Tyrants made their ability to absorb the elements almost as strong as that of a Balor and lessened the strain on their mana core.
Sucking a spell meant to cleanse it from the enemy's energy signature and replace it with their own.
It cost mana and poisoned the Tyrant's core, but the surprise effect of the instant counter made up for it. On top of that, Morok didn't have to waste time or focus to prepare his spells because he could just use those of his enemies.
It was how he had butchered so many elves so quickly on his own. They had expected him to be stunned from crossing the Fringe's border, whereas he had come out clear-headed, unleashing a couple of tier five spells as a welcome gift.
After that, he had finally let his fifth eye open without the risk of Awakening. His superior physical prowess combined with the ability to turn spells against their caster had done the rest.