User blog comment:Niyanrudan/Arc, the Assassin of Time/@comment-4434378-20120520175100

I don't like the passive. Something a little more original than Lux's passive would be cool.

How about: Every AA Arc applies a stacking debuff which explodes after 5 seconds. The debuff can stack up to 5 times and so the damage goes: 1, 4, 9, 16, 25 magic damage corresponding to 1,2,3,4,5 stacks (think Shadow Demon from DotA). The damage gets a multiplier of 2 (Lvl1), 4 (Lvl7), 6 (Lvl 11), 8 (Lvl 17).

It promotes him sticking to a target and then having them blow up like a Zilean bomb if he applied enough procs. The countdown to detonation starts after his last AA (so attacking would reset the timer).