Show an icon on the Nameplaters of the mobs that in the range of Gorefiend's Grasp if CASTED ON THE PLAYER.
You can choose a certain kind of mobs by input npcID.
This is mainly for the boss Souldrender. Since the adds moves slowly, I update the range check every 0.02s instead of every frame to avoid FPS drows. But the update is a little bit slow. So, it is better to get a little bit closer or wait a second before cast Gorefiend's Grasp.
Please let me know if there is other EVENT I can check to update.