How to make a destructible wall hazardous while it collapses?

Similar to the walls in the Arkham trilogy. If an airborne bit of wall hits an enemy, I’d like to cast to the enemy and set isDead to True.

This is my destructible wall bp. If the player hits the wall, it will be destroyed and the player can pass right through (rather than being stopped). I’m not sure how to go about making the wall hazardous as it collapses though. Thanks.