The rune of the anvil, when enhanced by your mastery of divine magic, allows you to become a bulwark.

Encounter   ✦     Divine, Runic, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength vs. Fortitude

Hit: 1[W] + Strength modifier damage. Until the start of your next turn, you have resist 5 to all damage against the target's attacks.

  Rune of Destruction: Until the end of your next turn, whenever the target shifts, you or an ally adjacent to you can make an opportunity attack against it with a bonus to the attack roll equal to your Constitution modifier.

  Rune of Protection: Until the end of your next turn, whenever the target shifts, you and each ally within 2 squares of the target can shift 1 square as a free action.

Published in Player's Handbook 3, page(s) 101.