Repeller
A post with a great membrane, two blocks tall. Feed it infrasound along a Vibrating Rod. Click it to choose on its screen whom it keeps off; any mix of groups:
- all hostile mobs (counts twice)
- undead, Nether, guardians and drowned
- spiders, slimes, illagers and witches
- creepers, endermen
- peaceful animals
In its field, a column the whole height of the world, hostile mobs of its groups do not spawn naturally, and every mob of them flees and drops its target. Each group takes 12 W in the normal gear for 48 blocks round (all hostile 24 W); less power a smaller field, down to 16. The gear sets how often it drives them and the power it takes (a water turbine’s 4 Hz is the slow gear: half). Spawners and spawn eggs still work.