The Undertaker may refer to one of two or both things: the group of Shadar-Kai fighting the Grandmother in the Shadowfell and a group of 5 famous adventurers sent on a mission related to the Grandmother.

The Undertaker 5

Four of the five undertakers have been revealed, although their goals, methods and fates are yet unknown.

Sketch of two of the five members of the Undertaker 5

Sketch of two more members