The Witcher: Enhanced Edition Director's Cut Puzzle Giveaway

Inspired by Simonli2575 (whom's last puzzle I absolutely hate :) I thought I'd give it a shot too.

So here are the hints:

The animal you are searching for has these characteristics: (Daran Wirst Du Dir Die zähne Ausbeissen!)
I3/3, C1/1, Pm4/4, M2/2 sometimes 3/3, 3/2, or 2/3 × 2 = 40, 44, or 42

Thats more letters than you need. One of the useless ones looks like a weapon which you need hard bolls for and the other obsolete one is...

lower and upper casing is dudududidu.

You need 5 letters or numbers (well it's just letters...) and have to put them into this URL:
http://www.steamgifts.com/giveaway/XXXXX
The 5 Xs being the 5 letters.

Ends on 26th 01:00 btw.