Naturalized Denizen

(Unearthed Arcana, page 94, DnD 3.5)

[Spelltouched]

You are unusually anchored to your location.

Prerequisite

Exposure to dimensional anchor spell

Benefit

You are never treated as an extraplanar creature (and you lose the extraplanar subtype). Thus, you can't be affected by a banishment or dismissal spell or similar effects that send extraplanar creatures back to their home planes.