Quest - Curing the cold

Well for some reason i wanna take a cute phelix as a pet. so i go to Ami Pet NPC at port of winds. For those who doesnt know, she is at floating ground in the middle of Port Of Wind.

Ami stricken in grief to see her pet catching cold and ask u to find mushroom at Ridge of Echoes in Mission Map at West Traitor Ridge. So, all u gonna do to find mushroom is to enter F4 mission map and kill this monster as the pic below:

This is th West Traitor Ridge Mission Map
See the upper right corner of this mission map. kill this monster
After completing it, go back to see Ami and get the reward.