Go to Leyawin and ask a someone about rumors. They should say something dealing with Rosentia Gallenus.

Go to her house and when you enter you should see some scamps, don't kill them they'll respawn quickly anyway.

Talk to her and she will explain what is happening. You should start a quest called "Whom Gods Annoy" and receive a Staff of Everscamp and need to drop the Staff of Everscamp.

Kill one of the everscamps in the shrine room, go to loot his body, and place the staff on his body.

A message will come up telling you to return to Rosentia Gallenus and tell her what happened. Now loot the body of the scamp and take back the Staff of Everscamp. Your quest is to take it to shrine in a cave and drop it there.

Once you reach the cave kill a scamp and put the staff in the scamp's inventory. If you drop the staff the game will not allow you to pick it back up.

After you put the staff in the scamp's inventory, exit the inventory and that part of the quest should be done.

Once it's done loot the scamps body for the staff. The scamps should no longer follow you, but you can keep the staff.

Just go to any alter of enchanting and enchant the staff with your favorite effect.