Mark of Trespassing - Kobold Taskmaster

From the entrance to the Temple of Sumter, go all north, all down, all west, and south. You will see a bunch of kobolds sitting here. Sayto the taskmaster 'disease' and he will ask you to help him, say yes. Walk around the area and when you find the kobold adventurer, he will ask you for help. Agree to help him by finding him the evil morkoth's golden crown. Go kill the morkoth and bring the crown to the adventurer, he will give you a cure disease scroll. Go back to the taskmaster and give this scroll to him. He will be cured and he will give you a password.

Note: if he doesn't offer you the correct password for 15,000 gold then you need to kill him and wait for repop, because you will need the correct password to enter another area and once someone gives a scroll to the taskmaster, he is cured for the repop until someone kills him.

Once you have the correct password, go to the room where the fire and lightning golems are (be sure not to kill them) and say it there. You will be transported to the room down. This room has a chest with a small amount of gold coins in it. Search for a northwest exit and follow the path until the end, then walk through the southeast exit, to CPK. Follow until the end and you should see a chest with some vials and maybe a righteous flail. If you don't have Tresspassing mark, getting a vial out of the chest will grant it to you.