Invisibility

Range: 240 ft
Duration: Until dispelled or an attack is made
Level: I2, M2

The object of this spell, whether a person or a thing, becomes invisible (to both normal vision and to darkvision). If the Referee is using the invisibility rules unchanged, the result is that an invisible creature cannot be attacked unless its approximate location is known, and all attacks are made at -4 to hit. If the invisible creature makes an attack, the spell is broken. Otherwise, it lasts until dispelled or removed by the caster.

Invisibility

Beneath the Borderlands SurrenderMonkey