Spider demon's limbs twitch violently and start to grow extra bone everywhere.

Spider demon growls as parasite roots deeper into its spine.

You focus your mind and send out command to convert 'Spider demon'. Parasite

controlling the host lingers for awhile and reluctantly attaches final

spiral-like leg inside the spine of Spider demon.

Spider demon twitches for a short while and suddenly collapses on the base of

the altar. Couple seconds later it gets up and stands in front of you.

Connection between you and the parasite resumes.. Parasites mind is wiped
empty

and it is as weak as newly born child.