Coronal Guard Attack 11Countering Thunderclap
You interrupt an enemy attack with a clap of thunder, driving the foe back from your friend before the enemy can strike.
Encounter Arcane, Implement, Thunder
Immediate Interrupt Close burst 5
Trigger: A creature hits your ally with a melee attack
Target: The triggering attacker
Attack: Intelligence vs. Fortitude
Hit: 1d6 + Intelligence modifier thunder damage, and you push the target 1 square. If the target can no longer reach your ally, the attack misses.
Published in Forgotten Realms Player's Guide, page(s) 48.