Hi guys, my problem is about tentacles. I'm pretty sure I've picked it up when I've faced with the monster. However, when I'm at the tower where I'm about slain the wizard, the f*cking tentacles were gone. They were not in my inventory. Because of that I cannot progress. The exact location is the teleportal door part. Do I have to play it over again or is there anything you guys would tell me ? Thanks again.

I know it's a very old question and long obsolete, but I simply couldn't resist answering ;-)

You might have put the tentacles into the freezer in Sanwe's lab and left them there. If not a bug, that seems the only place you're able to part with them.