Schiller used the Cthulhu Mythos skill on the bottle of wine.
"...As you look at this bottle of wine, you gradually recall some knowledge..."
A stream of information entered Schiller's mind.
"Golden Honey Wine: Restores 30% of maximum Mental Health Value upon use. At the same time, enters a 'Stasis' state. During this period, the user cannot move or think, cannot perceive any external information, and cannot be affected by anything external. Immune to all Mental Health Value reduction effects, but can still suffer damage from external forces. Please use with caution."
That was it, Schiller thought. He had finally obtained a key item. Not only did this thing have the invaluable effect of restoring Mental Health Value, but it could also make one immune to Mental Health Value loss for a period of time. In other words, it granted complete immunity to mental contamination. It was practically a god-tier skill.
But it had drawbacks as well. After drinking it, one could not move, and it offered absolutely no immunity to physical damage. They might not be mentally contaminated, but a single slash would still kill them.
So it was only suitable for resisting mental contamination in a safe environment, not for use in combat.
At the same time, it was a Divine Artifact for dragging out a messy fight. They could wait until the Old Ones descended, find a Secret Chamber and take a drink, then come back out to deal with all the other Black Hands after they had gone mad.
Schiller roughly formed a plan. He told Batman about the wine's effects. Although there was no indication of the number of uses or dosage, more than half the bottle remained. It should have been enough for both of them.
They searched the Captain's Cabin again and found