It was not only affecting him, but even the Suffering Knights and summoned creatures behind him were injured heavily from the Level Nine spell. The Succubus' Wail is basically a large-scale area-of-effect spell with friendly fire. If the Lich had not been forced into a corner, he would have never used this spell welded on his brow as the last resort.
"The Touch of Despair!"
Taking advantage while Garen was still under the effects of the Succubus' Wail, the Lich's body fluttered upwards, his hands started making a lot of complicated gestures at lightning speeds, sprinkling large amounts of mixed and messy powder of an unknown material.
A purple matrix emerged from below on the huge snowy plains.
The snow was quickly dyed dark purple, and huge purple tentacles that were a few meters in diameter sprouted out from the purple ground, wiggling straight towards Garen.