Thief Class Abilities:
Backstab
Gouge
Chameleon - enemy can't see you for first 3 turns or until you act or are damaged (passive)
Dodge - causes next attack to always miss the caster if it's damaging
Pickpocket - steal money and items from an enemy (upgraded version of Plunder)
Flee/Sprint - allows you to take a Move as an action command
Fluid Attack - makes a regular attack but doesn't decrease wait time
Drain Speed - drains part of target's speed statistic and increases own speed proportionally