The Elder Sign is a mystical sigil either drawn in
the air by gesture or inscribed upon a sturdy surface.
It commands respect from many of those from
Outside. When gestured in the air (costing 2 WP and
1 SAN), it prevents such beings from coming within
about 10 m of the gesturer for 2D6 turns, provided
the gesturer takes no hostile action against them. If an
entity is somehow physically forced into that radius, it
permanently loses 1D6 POW. As a gesture, the Elder
Sign affects a given entity only once in 24 hours.

The Elder Sign may be inscribed permanently
in a surface (preferably some especially long-lasting
stone or metal; the inscriber must have an appropriate
Craft skill at 20% or better) at a cost of 2 POW and
1D6 SAN. Beings from Outside cannot come within
about 10 m of it unless the sigil is broken, and they
lose 1 POW per turn if somehow forced to come that
near. For any except a Great Old One, this POW loss
can be fatal.

The most potent engraving of the Elder Sign
requires the sacrifice of 100 POW by the engraver
(who must sacrifice at least 2 POW personally, and
who must have an appropriate Craft skill at 20% or better), ritual chanters, or human sacrifices over the course of 24 hours, at a cost of 1D10 SAN plus the cost of violence to sacrifices. Beings from Outside
cannot come within 100 m of the Sign, and lose 1
POW per turn if somehow forced to enter that radius.
Even coming within 10 km saps such an entity of 1
WP per hour, until the entity vanishes—banished or
destroyed—upon reaching 0 WP. Rituals always fail
within that radius.