Descend to the tunnel with glowing crystals

You descend carefully, guided by the light of the glowing cristals.

After a few minutes, you spot a glint of metal, it's a magic sword and a suit of armor! their surfaces are marked with runes that glow in the dim purple light of the crystals. They seem too good to be true, and the unsettling ambiance of the cave makes you feel nervous...

As you approach the artifacts, you notice a nude girl walking, her movements are slow. Her eyes are disoriented, her mouth slightly open and she drools. She smiles and looks at you.
You try to speak to her, but she only responds "I serve the great master. I am happy. You will be happy too."

Frightened, you turn and run, but you feel a searing pain inside your head, freezing you in place. A mindflayer steps into view, its grotesque, tentacled face twisting into something resembling a smile floating using his mind powers.

Its psychic grip tightens, rendering you unable to move or think clearly. You feel his slimy tentacles brush against your face and head, his touch cold and invasive. Slowly, your resistance fades, replaced by a strange, calm. You start to relax and hear the girl’s voice. "You will serve. You will be happy."

And she's right, your master is your protector, you live to serve him and to satisfy his needs. You have a strong urge to offer your body to your master and you explore his body, looking for his penis. You lick him and you try your best to make him happy, you want to serve him because he deserves it.

You are a thrall, bound by the mindflayer’s psychic powers, you spend years in the dark of his cave, serving its will alongside the other girl, your mind clouded by a false sense of peace. Your pussy is always wet, ready for your master's cock and tentacles, you love when he explores your ass, and when he cums inside your mouth, the cave becomes your world, and the mindflayer’s whisper your only truth.

This lonely mindflayer is an outcast and lives like a hermit, you have a long life with enough food and security at his side.
Decades pass, and your body weakens until you are too old to walk. The girl, now as frail as you takes your hand and says "We are happy. We served our master as long as we can, but now we must rest..."

Bad Ending
Mindflayer's Thrall ending