Imp Catcher Guide:
Quest Length: Short
Items required: Black bead, Yellow bead, Red bead, White bead.(Purchasable)
Quest's required to start: None
Quest giver: Wizard Mizgog.
Firstly, you'll want to approach the wizard's tower in Draynor. This can be located south of the bank, along a stone bridge. Inside the tower on the 2nd floor you'll see a Wizard named Mizgog. Talk to him and ask questions until he asks for your help.
He will tell you that Wizard Grayzag's imps have stolen his beads and he will need you to get them back for him!
Getting the beads
The beads are randomly dropped by imps all over Runescape. The bead drops are uncommon so this part may take a while if you haven't brought them from the Grand Exchange.
Imps popular locations are Ardougne, Varrock, Falador, Lumbridge, almost always on the outskirts.
Returning the beads
Once you have all the beads (through any means), return to Wizard Mizgog in the Wizard's tower to receive your reward.
The reward is an amulet of accuracy, 875 Magic XP and 1 quest point.