The present disclosure describes a broadhead for an arrow. The broadhead includes a first portion, as defined along a longitudinal axis of the broadhead. The first portion includes multiple cutting walls that extend radially from the longitudinal axis and define a first plurality of voids between the cutting walls. The outer edges of the cutting walls form edges of a generally pyramid-shaped volume that includes the first portion and the first plurality of voids. The broadhead also includes a second portion that abuts the first portion. The second portion includes multiple concave lopes defining a second plurality of voids. The concave lobes have an inner surface that extends radially outward from the first end along the longitudinal axis to an opposite, second end of the second portion.