Kelok's Tomb (D20)

From the introduction:

This adventure involves the investigation of a warlock’s tomb by a party of low level adventurers. While the adventure is intended for a lower level group of characters, it is a challenging adventure and can be quite fatal for the ill prepared. The opponents are intelligent, dangerous and some have surprises in store for the players.

The players’ most dangerous foe will be the magic user Tigermane, who is cursed with lycanthropy. Because of the presence of this dangerous monster the referee should be certain that the characters have some ability to combat it before running the adventure. Of course, the referee should not blatantly warn the players to acquire silver weapons and such.