3e SRD:Gaze Attacks
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Each character within range of a gaze attack must attempt a saving throw (usually Fortitude or Will) each round at the beginning of his turn.
An opponent can avert his eyes from the creature’s face, looking at the creature’s body, watching its shadow, or tracking the creature in a reflective surface. Each round, the opponent has a 50% chance of not having to make a saving throw. The creature with the gaze attack gains one-half concealment against the opponent (so any attack the opponent makes against the creature has a 20% miss chance).
Wearing a Blindfold
An opponent can shut his eyes, turn his back on the creature, or wear a blindfold. In these cases, the opponent does not need to make a saving throw. The creature with the gaze attack gains total concealment against the opponent as if the creature were invisible. Thus, any attack the opponent makes against the creature has a 50% miss chance, and the opponent can’t use sight to target attacks.
A creature with a gaze attack can actively attempt to use its gaze as an attack action. The creature simply chooses a target within range, and that opponent must attempt a saving throw. If the target has chosen to defend against the gaze as discussed above, the opponent gets a chance to avoid the saving throw (either 50% chance for averting or 100% chance for shutting eyes). It is possible for an opponent to save against a creature’s gaze twice during the same round, once before its own action and once during the creature’s action.
Looking at the creature’s image (such as in a mirror or as part of an illusion) does not subject the viewer to a gaze attack.
A creature is immune to its own gaze attack.
If visibility is limited (by dim lighting, a fog, etc.) so that it results in concealment, there is a percentage chance equal to the normal miss chance for that amount of concealment that a character won’t need to make a saving throw in a given round. This chance is not cumulative with chances to avoid the gaze, but instead is rolled separately.
Invisible creatures cannot use gaze attacks.
Characters using darkvision in complete darkness are affected by a gaze attack normally.
Unless specified otherwise, an intelligent creature with a gaze attack can control its gaze attack and “turn it off” when so desired.