A Combat NPC is left at your present location whenever you log out of the server.
- If your combat NPC is killed by another player, your current inventory will drop from the NPC and you will die upon your next login.
- Logging out of the server will cause combat NPCs to render at least one chunk until they despawn.
- Combat NPCs last for four minutes, after which they (should) despawn.
- Protect your NPC by logging out in a safe area. For example, you can build a bunker with an Area Shield.