Magical Shield Down
Right click the link to the sample below, choose "Save target as ..." and save it with your other sounds.
The partner to the Shield Up sound, this sound is for when the shield breaks. The trigger phrase was chosen so that the sound will trigger for yourself and others in the same room. It will also trigger both when the shield breaks in combat through damage and when it just wears off.
Thanks go to Xenophor for the original idea of creating triggers for this and to keen young Shro for helping me extensively test the triggers.