Backstab - the attack at the last opponent in the row. If successfully performed, it causes bleeding. It is easy to eliminate the enemy casters in this way.
II - increases the damage;
III - increases the damage per the opponent's every bleeding level (Bleeding can accumulate five-fold)
IV - your attack adds two levels of Bleeding;
V - increased damage to the stunned and slowed opponents. The basic for the thief. Upgrade to the maximum, as fast as possible.
Mug - a stunning attack. Additionally, you steal and item from the opponent - an useful potion, if you are lucky. Valuable only for the sake of the stunning effect. Do not upgrade this ability.
II - increases damage;
III - successful stealing also steals you the positive effect;
IV - stealing heals you;
V - the stunning effect lasts longer.
Execute - an attack that also destroys the armor and the weapon.
II - the final blow deals the most damage;
III - increased damage to the stunned opponents;
IV - perfect attack provides you with a bonus;
V - perfect attack enables you to perform two actions.
Stink Bombs - a throw of a series of bombs, they Gross Out and remove positive effects.
II - increased damage;
III - more bombs;
IV - you piss off the enemies;
V - the AoE attack.
Death by Thousand Blades - AoE attack that causes bleeding.
II - increased damage. Death inflicts more damage, in itself. With this attack, they are even higher. All of the additional points can be ignored and upgrade the Stink Bombs instead.
III - Attack Down on the opponents;
IV - requires less PP;
V - the attacks heal you.