Message #402488

[Butch2k]

If the damage kills your target or renders the target unconscious, your attack of opportunity foils the action that triggered the attack. If you've made your attack of opportunity in response to a foe using a spell or spell-like ability, your attack interrupts the spell or spell-like ability. If you slay your target or render the target unconscious, the spell or spell-like ability is disrupted. Even if the target survives the attack, the damage you deal might still disrupt the spell or spell-like ability if the target fails a Concentration check. This is one case when an attack of opportunity happens during the action that triggers it rather than before that action.

If you've made your attack of opportunity in response to a foe entering your space, your attack interrupts your foe's movement. Though you make the attack in response to your foe's attempt to enter your square, you make the attack before the foe actually does so. If you slay your target or render the target unconscious, you prevent the foe from leaving the space it occupied just before it tried to enter yours. If you have a reach of 0, you still can make attack of opportunity against foes entering your space. In that case, you make the attack within your space and if you slay your target or render the target unconscious, the foe goes back to the space it left.