This impossibly large message appears in glowing golden script on the rockfaces facing Shadowglen, just before the narrow pass that leads to the Shadowlands:
BEWARE! New threats roam the Shadowlands!
Spheres of Darkness which swallow holy magic and pulse with evil energy!
Clusters of Souls which attack blindly in their anguish with radiant lashes!
Worst of all, the destruction of shadow creatures often calls forth Spheres!
Travel carefully and with capable company! - Wren