Rune Caster: Skilled Casting

* Applies [Rune Caster: Casting] after using any Rune Caster skill{nl}* One stack of [Rune Caster: Casting] changes the casting speed of Rune Caster skills to 1 second{nl}* Two stacks of [Rune Caster: Casting] change the casting speed of Rune Caster skills to 0.5 seconds{nl}* [Rune Caster: Casting] Duration: [3 seconds + 0.2 seconds per attribute level] + 2 seconds at maximum level{nl}