Where can you find broom of doom

This question is the same as another question (only a bit more vague). I have copied and pasted the answer here:

Start quest at Valencia. Kill dark witch in marsh until you get the unidentified broom. Turn in to Valencia.


the other question and answer can be found here:
http://wiki.answers.com/Q/Where_can_you_get_the_broom_of_doom_in_aqworlds