Sigil of the Ruthless Ranger (Un-attuned)

Upon dealing ranged damage, you have a 15% chance to cripple the target's movement. The effect deals 15 damage (33% less damage in 3-60 worlds) over the next 6 seconds and also drains a total of 15 run energy in that time. The damage is doubled against targets with less than 10% run energy. A target can only suffer from one crippling effect at a time.