I have a scenario that occurred in our recent game. The Cleric used the 17th level encounter power Enthrall which states on hit:
Until the end of your next turn, the target is immobilized and cannot attack you.
The Cleric then moved into close quarters to effectively stop the creature from making burst attacks affecting other party members.
On the next turn the party rogue dealt a killing blow which is where the issue occurs.
As a free action when reduced to zero hp the creature makes a close burst 20 attack.
So, has the Cleric made a tactical masterstroke stopping the creatures "death throes attack"? The Enthrall effect only lasts a turn so arguably it's good fortune for the group. However, is it a little overpowered to stop an effect from the death of an enemy?