Ja, det gör
Skyddstillståndstillstånd:
An iron band, this simple ring generates a shield-sized (and shield-shaped) wall of force that stays with the ring and can be wielded by the wearer as if it were a heavy shield (+2 AC).
Force of Force Spell har sökordet [force]
Incorporeal Creatures säger:
An incorporeal creature’s attacks pass through (ignore) natural armor, armor, and shields, although deflection bonuses and force effects (such as mage armor) work normally against it.
Betona min.
Eftersom ringen duplicerar en stavning med [kraft] sökordet, är det en krafteffekt och skulle därmed fungera normalt mot odödliga varelser.
Referenser: