User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-41.13.12.215-20190801100529/@comment-2601:87:8300:20D0:40F:AC97:3640:C209-20190803011333

Its funny I have a feeling Vali would be able to do it by himself without the medicine. As for using Lilith's power he needs to be in a situation in a fight where he needs it before fighting Issei.