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This appears to be a normal, small-sized dagger. However, when this broad-bladed weapon is wielded by a small-sized creature, it will actually lengthen, dealing damage as a medium-sized +2 adamantine shortsword. Even when functioning in this way it remains as light and handy to use as a dagger would be in the hands of the same character. The weapon will actually penetrate wood or stone as easily as it will softer material.