Undead Ward

The line you etched in the floor shines like ivory in moonlight, and the skeletons stop advancing.

Component Cost: 35 gp
Market Price: 130 gp
Key Skill: Arcana
Level: 3
Category: Warding
Time: 30 minutes
Duration: Until broken

You create a magical barrier against undead creatures. This barrier can be a closed circle, with an inscription time of 1 minute per square inside the circle, or a line, requiring 1 minute per 2 squares of length. An undead creature whose level is lower than your
    Arcana check result – 10 cannot pass through the barrier, affect creatures through the barrier, or affect the barrier in any way. Any other undead creature takes radiant damage equal to your Arcana check result when passing through the barrier, but doing so breaks the barrier and ends the effect. Any creature able to pass through the barrier can take a standard action to obscure the inscription and thereby break the barrier.

Published in Open Grave, page(s) 50.