Respawn settings. They were added around A10.5. Static: Spawner will spawn creatures with or without a core on the POI it's on. Respawn: The creatures will respawn when killed with a 1 minute delay. Originally, the respawn mode was built into the Spawner Pads so that zirax troops would continue to spawn until you destroyed the spawner pad. That's no longer necessary, which is why many zirax POIs are much easier since they weren't updated with it active once the new settings were added. Now, all the old POIs have a single run of enemies and that's it. You can ignore the pads once you've killed everything they spawn. If Static isn't set, the spawner will only work if there's a core. If Respawn isn't set, the spawner will spawn everything in its list then stop working.