You can possibly do this by placing a static entity down of the object down that you want remaining, Then place a non moving, dynamic entity with no collision that is slightly bigger than the static one on top of that one. Bigger so that it completely covers the static one. Set a trigger zone that reduces the dynamic entity's health to 0. This essentially "kills" it. If possible you could use a death effect like in Model pack 52's Medusa Monster. That would be the how to, but I do not have any idea on the scripting for it.