Sadri the Traitor can spawn on 3 different locations in 3 different forms/disguises:
a) as a shark at the Staff of God area -> meso 12300,56000
b) as a traldorean mercenary at Traldor's Oracle area -> oceanus borealis 12000,57000
c) as a crocodile at Crocodile's Tears Ring area -> oceanus borealis 52900,26000
He is neutral untill you pull him, then he changes into his true sobekite form.
Generally drops traitor's dagger (arti), 1 item below or ROG/Unique item, and a bag of coins.