Horn of Collapsing

Horn of Collapsing: The horn appears to be a normal musical instrument, perhaps a bugle or warning horn of some sort. If it is sounded improperly (e.g., without first speaking the proper command word) or 10% of the time in any event, the following will result:
Out-of-doors: A torrent of fist-sized rocks will strike the individual sounding the horn, 2d6 in number, each causing 1d6 hit points of damage.
Indoors: The ceiling overhead will collapse when the device is blown. The character suffers 3d12 points of damage.
Underground: The area immediately above the character sounding the horn will fall upon him. The damage is 5d4 points base, multiplied by one for each 10 feet of height which the material above drops (i.e., twice damage if a 20-foot ceiling, three times damage if a 30-foot ceiling, etc.).
Proper use of a horn of collapsing enables the character to sound it while it is pointed at the roof overhead from 30 to 60 feet beyond the user. The effect is to collapse a section of roof up to 20 feet wide and 20 feet long (10-foot radius from the central aiming point) which inflicts damage as noted above if indoors or underground only.
Category:DMG Magic Items
Category:Magic Items
Category:Magic Musical Instruments