Like all the Legiones, he attacks by throwing energy on the floor, which damages players who step on to it and attacks with a basic magic attack. He also has a unique ability, which is to summon other ascended to aid him. He summons three Rorarii at 75% life points, one Gladius at 50%, and finally a Capsarius at 25%. Once the capsarius uses it healing buff on Tertius, it will need to be killed - but it is possible to kill Tertius before the capsarius focuses on him, using a combination of high level weapons and powerful, well-timed abilities. The ascended he summons do not drop anything. When Tertius dies, all his summoned ascended also die.