Milo could feel that whatever had just happened when he had headbutted Frenand had provided a small refreshment to his golden mana, and even slightly healed him, but it was like a drop in the ocean, he was still losing blood at a rapid rate, the undead still had the upper hand, but Frenand was definitely feeling the strain of being invaded by golden mana as well, the skeleton had resisted it for far longer that should have been possible, as this wasn't something one could just power through easily.
It was insidious and quick, the undeads Milo had faced before being taken here had nearly dissipated instantly after receiving a head-on blow from him, the lieutenant meanwhile, had endured multiple, including whilst Milo had in that strange state of rapid energy flow, and even taken that strange attack that filled the room with gold directly, but for all intents and purposes, he was still fine.