Repeat
Unconditional
Always Active
posx-posz
effect @a[tag=!admin, x=1300, y=0, z=1300, dx=5000, dy=512, dz=-15000] fatal_poison 5 3
Chain
Conditional
§c§lBorder[N]
say @p[tag=!admin, x=1300, y=0, z=1300, dx=5000, dy=512, dz=-15000] §cTurn back or the world border will kill you!
not sure if this will help. Like I said, since an x y z dx dy dz are present, it should only work on that dimension.
I have a border system as well for the Overworld and Nether. Im using x y z dx dy dz so the commands only work on those dimension, but the commands from the nether is affecting my players in the overworld.
Repeat
Unconditional
Always Active
posx-posz
effect @a[tag=!admin, x=1300, y=0, z=1300, dx=5000, dy=512, dz=-15000] fatal_poison 5 3
Chain
Conditional
Always Active
§c§lBorder[N]
say @p[tag=!admin, x=1300, y=0, z=1300, dx=5000, dy=512, dz=-15000] §cTurn back or the world border will kill you!
not sure if this will help. Like I said, since an x y z dx dy dz are present, it should only work on that dimension.