Phantom (CR 4)

Phantoms are translucent spirits of creatures that died a particularly violent death. A phantom appears much as it did in life, though its form is clearly translucent and incorporeal. Phantoms have no attack form other than causing fear.

Phantom (Haunt, Undead)
CR 4

XP 800
Haunt, Undead
Usually CE haunt (5 ft. by 30 ft. cone)
Caster Level 4th
Notice Perception DC 15 (to hear the sound of wailing)
hp 6; Trigger proximity (30 ft.); Reset 1 day
Effect When this haunt is triggered, the phantom rushes towards the nearest target, crying and wailing.  All creatures in the cone are targeted by a fear spell (save DC 15).
Destruction A banishment or dismissal spell must be cast on the phantom.

Editor's Note
A CR 4 hazard should have an XP value of 1,200. 

GM's are encouraged to use this value.