“Reaper chill”, every time a reaper chill a target, he applies a stack of reaper chill, up to 10
So, make traits stack with it, like Decimate Defenses: Strking a foe with reaper chill, increases you critical chance dmg(x% for stack) and half for allies
Cold Shoulder: Foes with reaper chill deal less damage to you (x% for stack.)
Chilling Victory: Striking a foe with reaper chill grants might for you and allies and life force.
Chilling Nova: Critical hits against chilled with reaper chill causes an explosion that chills adjacent foes.(30% chance for allies, dmg scales with stacks of reaper chill)
Soul Eater: Greatsword skills gain reduced recharge. Hitting a foe with reaper chill makes gs skills to do x% extra dmg for stack and periodically heal and gain life force.
Augury of Death: Reduces recharge of shouts. Your shouts gain additional recharge reduction for each foe they hit(more if it hits a foe with reaper chill)
Reaper’s Onslaught: Attack faster and gain ferocity for allies if hits a foe with reaper chill while in a reaper’s shroud. Killing a foe while in a shroud reduces recharge on all shroud skills.