simplest shulker mob switch without chunk loader

At the boundary of the spawn chunks, a mob switch is designd by using the teleporting regular pattern of shulker

[lzyhippo]

Really cool design. Might scale this up, encase it in glass (covered in buttons) and use it as a mob switch for a server.

[Oaky_BTW]

the farm is permanently on you cant turn it off until you kill them