Krystal Flash Muddler Black - Muddler Streamer. Incorporating a dazzle of Krystal Flash the already popular Black Muddler Minnow becomes even more dangerous. This extra touch improves this patterns capabilities tenfold as it includes all the deadly qualities that the Black Muddler Minnow only shinier. Trout simply cannot get enough of this fly. Fish this fly in any stream, river or lake and you are guaranteed to have results.