Sword of Sigils
Swordmage Attack 1
Close burst 1
Target: Each enemy in burst
Attack: Intelligence vs. AC
Hit: 1[W] + Intelligence modifier damage, and the target is marked until the end of your next turn. Until the mark ends, if the target makes an attack that does not include you as a target, it takes force damage equal to your Intelligence modifier after the attack is resolved.
Aegis of Shielding: If a target marked by this power hits a creature within 10 squares of you with an attack that does not include you as a target, you can use an immediate interrupt to reduce the damage dealt by that attack to any single creature by an amount equal to your Constitution modifier.
Sword of Sigils is an Encounter power available to swordmages at 1st level.