Invisible
Player's Handbook · Appendix A: Conditions
- An invisible creature is considered unseen to other creatures, without the aid of powers or a special sense that allow it to detect the creature, as described in "Unseen Attackers and Targets" in Chapter 9. For the purpose of hiding, the creature is heavily obscured. The creature's location can be detected by any noise it makes or any tracks it leaves.
- Unless a creature benefits from powers or a special sense that allow it to detect the creature, attack rolls against the creature have disadvantage, and the creature's attack rolls have advantage.