Quote from Kenero;1111033:
Sand burst forces monsters to drop aggro after the sandburst duration, however when that happens, a new enemy will aggro you right away.
So in conclusion, you have 15+ seconds of only one aggro, This is very useful for single-target classes.
Sandburst also holds more usefulness, how?
• Your raincloud just ran out, and theres one monster left in the room, before the next spawn, you can blind it then pop out a raincloud then kill it.
• You can also use it like this: Chain cylinder WC > Sandburst > Manually charge up WC > Sandburst > charge it up again(this works very well on the boss round of NPC arena!)
• You can also do alot of other things like, Music buff yourself, set things up like Barriers/hydra/clouds ect.
• Only thing it has over lullaby is that you can blind a monster more then once.
• Mages get the best of it cause of Guard cylinders, too.