Scorpion Catcher

Beginning

 * To begin, talk to Thormac on the top floor of his tower south of Seers' village. He'll tell you that his rare Kharidian scorpions have escaped and are currently running loose. He'll give you a cage to catch the scorpions in and suggest you go talk to the seers that live just to the north.

The first scorpion

 * With the cage in your inventory, speak to a seer. He will tell you about a secret room with nasty spiders nearby. This is in the Taverley Dungeon.
 * It is recommended to take an Anti-poison potion, an Anti-dragon shield, and a dusty key if you have one. Go to the dungeon any way you want (Games necklace to the Burthorpe Games Room, Combat bracelet to the Warrior's Guild, House Teleport if you have a house in Taverley, or Falador Teleport and walk to Taverley).
 * Enter the dungeon. If you have level 80 Agility, you can take the shortcut directly to the Poison spider area. If you have level 70 agility, you can use the shortcut to the blue dragons and walk from there. Otherwise, walk the length of the dungeon and use the dusty key on the gate to enter the blue dragon chamber. Then go south of the dragons, west to the Black Demons, and north to where the poison spiders are.
 * Find the small room with a false wall that you can push. Enter it.
 * To catch the Kharidian scorpion in this room, use the scorpion cage on it. If you try to pick up the scorpion, it will sting you, inflicting 3 damage.

The second scorpion

 * Return to the seer (with your cage) to find the location of the second scorpion. The seer will tell you it's in the possession of a merchant, in a "village of uncivilized-looking warriors in the east". This obviously is Barbarian Village.
 * Go there and speak to Peksa, asking him about the scorpion. He will tell you that he left it as a "surprise gift" to his brother at the Barbarian Outpost, under the bed.
 * Go to the outpost (the games necklace can teleport there). Players who have not completed the Bar Crawl miniquest are not allowed to enter the outpost.
 * One inside, enter the agility training course there. The scorpion is in the small hut to the east of the entrance. Remember, use your cage on it or you will be dealt 3 damage.

The third scorpion

 * Return and talk to the seer again. He'll tell you the third and final scorpion is in the Monastery (on the first floor, not the ground floor).
 * Go to the Monastery (a a combat bracelet can teleport directly; an Amulet of glory can teleport to nearby Edgeville). You must have level 31 Prayer to get upstairs in the Monastery.
 * The scorpion is in the eastern wing of the first floor. As always, just use your cage on it to catch it.

Ending

 * Take the full cage of scorpions back to Thormac and you're done!

Rewards

 * 1 Quest Point
 * 6,625 Strength experience
 * Ability to have Thormac make an elemental Battlestaff into a corresponding Mystic Battlestaff for 40,000 coins.