The spheres formed a six-pointed golden star that took away Veeza's magic and pinned her in mid-air as if time had stopped for her. It was the perfect form of Silverwing's Hexagram which employed spirit magic as well.
Spirit magic carried the mana and the willpower of its Awakened caster, allowing Milea to conjure an array in a matter of seconds instead of minutes. Also, spirit magic gave the magical formation a physical manifestation, so that while the elements restricted the Lich's blood core the green energy trapped her body.
Without her hands, Veeza had no way to cast more spells. The undead tried to unleash the power of the artifacts she wore, but the containment field turned them against her and since they weren't fueled by her mana but by their own pseudo cores, Veeza only ended up harming herself.
