Everything
Once Michael unleashed Extraction on top of his other Soultraits, he felt like his head would split apart as a searing pain shot through him. However, by using Extraction to extract the origin energy in the surroundings, he could solve the problem of his dried-out energy storage to a certain degree.
Using too many Soultraits simultaneously was not easy, but it worked – more or less – thanks to the external pressure Tiara and the Forest Elves put on him. Michael was also growing more excited when he felt that Extraction's potency was strong enough to annex the energy in the surroundings without being fully unleashed.
At this point, Michael didn't even have to focus on Extraction to unleash it. A simple thought was all it took.
The annexed energy was enough to empower Eagle Eyes reinforced with four layers of Enhancement, and his other Soultraits such as Reinforced Sword Qi, Glacicle, and three Spirit Whips without an Enhancement.