As the title says, it's a simple rune shooter.
I have not found anything like this in the forum then asked for help to a friend, and he sent me this persistent.
This persistent use the rune in the creature you are attacking at the time, so you don't need a creature name, number of creatures on screen, etc.
It will shoot runes only in the creature you attack.
auto(100)
useoncreature(itemid('avalanche rune'), $target)
Of course, you can change the name of the rune! Just erase the avalanche rune and use as you want.
Ps.: This persistent is good to do team hunts "manually" =P
Ps2.: You can use it as a hotkey so you can enable or disable whenever you want.
Ps3.: Sorry for my bad english.