Grease bomb: as soon as you move (or every round on the square where you try to act), you have a chance of falling (exhausted). If you moved of the square and fall you are still on the square you went for but are on your ass.
Potions of regeneration: Small healing over time (could be mana ones too).
Potions of invulnerability: Increased armour or magic resistance for a short period of time.
Potions of speed: Stamina regens quicker (optional, could take a small amount of damage a turn because of the strain on your body).
Caltrop: Throw caltrops to the ground to cover your escape, chance of immobilising someone trying to move of the square, and causes a small amount of damage.
Imagine being able to buy nets that immobilise the victim. Could be class restricted to Assassin/Ranger. One use, prey cant run.
/me hides
