The Spawner creates mobs from a filled syringe, FE, and materials supplied by linked Matter Beamers. The selected mob determines which materials are accepted.
Syringes
Use a syringe on the same mob type until it is fully injected, then place it in the spawner. The tooltip shows the stored mob and injection level.
Materials
The GUI shows three matter buffers. Matter Beamers must send the required materials for the mob in the syringe; unrelated materials are ignored.
Efficiency
Supply enough FE and keep the beamers stocked. Infusing the spawner improves efficiency, while infusing beamers improves how fast and cheaply they deliver items.