Your dragon mark sends a magic charge into your enemy when you hit, creating a link that lets you divert the foe's attacks.

Encounter   ✦     Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Strength or Intelligence vs. AC

Hit: 3[W] + Strength or Intelligence modifier damage, and the next time the target hits an ally with a melee attack before the end of your next turn, you can choose to have the attack instead hit you.

Published in Eberron Player's Guide, page(s) 68.