After spending the entire day browsing the modeling tutorial section I came up with this thing from Diablo 2. Thing is, its used as a missile but it cannot be looped due to bouncing anims.
-So PaY AtTeNtIoN.-
Spell - "Carrion Swarm"
Set the missile speed to 200
Set the distance to 400
If you do this then the spell functions as it should. You can mess around with the speed but then you would have to adjust the distance as well.
Updated. Messed around with particles and reduced them.
Keywords:
Diablo 2, Molten Boulder, Godfall