Blade Cascade

Time seems to slow down as your weapons fall upon your hapless foes like rain from an ominous sky. This spell only works if you are duel wielding. You target 1, 2 or 3 creatures within range, Alternate main and off-hand weapon attacks until you miss. As soon as an attack misses, this attack ends. After you successfully hit 4 times in a row you start to feel tired and become exhausted. After 5 attacks you suffer first level of exhaustion, 7 attacks 2nd level, 9 attacks 3rd level, 11 attacks 4th level, 13 attacks 5th level, and after 15 successful attacks you don't die but you fall unconscious and don't wake up for 8 hours.