The First Fortress was a redoubt built to defend against the primordials' attacks on the Astral Sea. This rune was carved to bolster the fortress's gates.

Daily   ✦     Divine, Weapon, Zone
Standard Action      Close burst 3

Target: Each enemy in the burst

Attack: Strength vs. AC

Hit: 2[W] + Strength modifier damage.

Miss: Half damage.

Effect: The burst creates a zone that lasts until the end of your next turn. While within the zone, you and your allies gain resist 5 to all damage. Any enemy that willingly enters the zone is immobilized until the end of your next turn.

Sustain Minor: The zone persists.

Published in Player's Handbook 3, page(s) 107.