Leonidas's ability is to exploit weakness. He achieves this primarily by creating small, precise vulnerabilities in other creatures (an Achilles heel). These vulnerabilities only appear when one engages in combat with Leonidas, and they manifest randomly across the target's body as a red mark. Successfully attacking this mark will paralyze the target for a period of time. Attacking the mark with his tail, however, will kill the mortal or temporarily disrupt an Omnia's form. Leonidas's own vulnerability is that he is subjected to serve whoever is in possession of his vial, effectively living as their gladiator.

The second part of Leonidas's power enables him to change weapons in battle that adapt to the situation. He can only create up to two weapons at a given time, however.

Voice claim is Kratos (GOW4)