Paultin's shadow first animated when the group was at Van Richten's Tower. It crept up behind Dee.
When the group went to Castle Ravenloft, the shadow stole the Strahd doll from the group. Paultin destroyed the shadow with his sunsword and the group retrieved the doll.
Shortly after the waffle crew returned to Faerun, Paultin noticed that was casting a shadow once more.
When the group returned to Barovia, they learned that Paultin's shadow contained a shard of Strahd's essence, and it was the ruler of Barovia. Some referred to it as "the master". Paultin attacked the shadow with the sunsword and rolled a natural 20, completely destroying it.