Requirement for execution: Agility 2, Intelligence 3
Requirement for execution II: Willpower 3, Intelligence 4
Execution: If the enemy is crouching and you haven't attacked in the last two seconds, you can strike and deal a critical hit.
Execution II: If the enemy is sttuned and you haven't attacked in the last two seconds, you can strike and deal a critical hit.
The formula to calculate the damage dealt by a critical hit is: (10 + 3 x (Int + Int pluses - 2) x damage) / 10