Lis has not only faced the Endless Abyss Will directly but is also a Demigod Arcanist.
His soul and spirit strength are far more formidable than Garrison's.
Therefore, Lis regained consciousness much faster than Garrison.
Lis also guessed what Garrison intended to do.
In his view, regardless of what bizarre ability this Vampire possesses, his essence is still nothing more than a being that hasn't even reached Legend status.
Facing Demogorgon's strength, confronting that terrifying will's impact, it's understandable that the opponent would have a hard time enduring it.
Generally speaking, anything less than Legend would collapse into a twisted mess of flesh when facing Demogorgon's will impact.
This Vampire is indeed unusual, but he will at least be affected.
Even if he survives, the time it takes for him to regain clarity would be much longer.
After witnessing Lis directly usurp control of Skeleton Tomb and set up the Light Magic Array, Garrison indeed felt uncertain.
