, In addition, it can use the Rival battery pack, which makes it fire better and saves you a fortune in batteries over the lifetime (plus they can be used across several of the Rival range, so a very recommended add-on!) I am a big fan of the Rival range as I like the power and the accuracy, and as an adult (is size at least!) fits me well. This blaster is easily the best semi-auto in the Rival line, fixing the problems of the Zeus. These are aimed at the 14+ age group so fire a bit harder and more accurately than their Elite cousins. The Hera is a member of the NERF rival line, which fires small, balls of foam rather than darts.