Rainy's Powerhouse StoneBig, mean and powerful describes this powerhouse of a stonefly nymph. This is your new GO-TO early season point fly and for good reason. This thing is buggy! We are big fans of dyed spandex legs on our stonefly nymphs and this fly has them in force. Add to that the "bushy" body you rarely see in stonefly nymph imitations and you have a stellar subsurface fly.