Listen

Listen alerts a character to hidden creatures that may be nearby.
 * Ability: Wisdom
 * Classes: All
 * Requires Training: No
 * Check: Listen detects hidden creatures by opposing their Move Silently check. A successful check renders the hidden creature visible, and makes it a valid target for the listener.
 * Special: Standing still provides a +5 bonus to a Listen check. A character with the Alertness feat gains a +2 bonus on Listen checks. Ranger gain a bonus when listening against a Favored Enemy. Elf, Gnome, and Halfling gain a +2 racial bonus to Listen checks. Half-Elf receive a +1 racial bonus.
 * Use: Listen is part of the Detect modal action. In Passive Detect mode, checks are made automatically every round. Active Detect mode is a modal action that reduces the normal movement rate and makes the character perform an Active Listen, as well as Search and Spot checks.