Out of Power
Other than Enhancement, there were many other Support Soultraits at play. Two Berserkers used Soultraits similar to Lokai. They enhanced their physical strength and those of their allies by a large chunk, while simultaneously elevating their energy circulation.
Their Soultraits made it much easier for Michael to use his Soultraits with a single thought and unleash a barrage of attacks. Given his usual combo of Glacicles that were either strengthened through Enhancement and Reinforced Sword Qi to increase their lethality or used as mass-produced projectiles to Insert traces of Extraction inside the enemies, Michael could now combine both means of attacks.
That was definitely not helpful for his rapidly decreasing mental power but the Extraction traces inside the enemy took root quickly. They drained the enemy's origin energy and tapped into their lifeforce as well once Michael used Spirit Disturbance on them several times in a row.