What instrument did mussorgsky use in a night on a bare mountain?

In "A Night on Bald Mountain," Modest Mussorgsky primarily utilizes a full orchestra to create a vivid and dynamic soundscape. The piece features prominent use of brass and woodwinds, along with strings and percussion, to evoke the eerie atmosphere of a witches' gathering on a stormy night. The orchestration enhances the dramatic contrasts and climactic moments throughout the composition.