10-Relentless:(Requires 20 pts in Berserker Branch, Requires 5 pts in Rhythm)
-Repeatedly attack enemies without pause for as long as you have energy, tap rapidly to continew attacking.
-Rank 1/2/3/4/5: 35/30/25/20/20 Energy, 400/400/400/400/600 Water Damage, 0 sec cooldown.