I think it'd be really cool to give shadower a skill that does this to manipulate enemies. It would work like NW's Shadow Stitch but instead of just binding the enemy, shadowers could manipulate monsters for [common bind duration] by forcing them to move in the direction you're moving, jump when you jump, or attack when you attack (except they would attack each other, not you). One extra thing I would like to add to this skill is that if you press the skill again to prematurely end the bind, the shadow explodes into fragments that impale monsters and dealing damage.
How it works is simple: You can only bind 1 enemy (including bosses), and if it successfully touches an enemy, it can splash chain to other enemies at half the original attack range, binding up to 7 more enemies. Bosses only get bind for half duration btw. Monsters are in your control for 10 amount of seconds until they are either freed or you can press the skill button again to prematurely unbind monsters and deal large amounts of damage. Recommended damage % at about 450% damage * 5 lines and works with shadowparner. Hitting the skill button again early also adds remaining bind time as subtracted cooldown (300 Seconds) at the rate of 1 second left of bind : 15 seconds of cooldown subtracted, up to 150 seconds, if bind duration is only 11 seconds. This is based on the first monster you hit before it splashed to other monsters.
Hyper Passives could be added in the removal of Maplestory Mesos Explosion's Hyper Passive (that skill is long dead now with the direction KMS is heading with Shadowers).
Req. Level 143: Shadow Possession- Reinforce: Increases damage of Shadow Possession's Shadow Explosion Damage by +10%. Edit: Previous damage increase was +20%, but I forgot that Boomerang Stab increases all Attacl Skill Damage by +25% anyways, which would make this skill slightly overpowered.
Req. Level 162: Shadow Possession - Cooldown Cutter: Changes ratio of 1 second left of bind : 15 seconds of cooldown to 1 second left of bind : 20 seconds of cooldown (up to 200 seconds reduced)
Req. Level 183: Shadow Possession - Bind Duration Increase: Increases Max Bind Duration to 15 seconds, bind duration no longer halved on bosses. (0 cooldown if this skill is used purely to spam the Shadow Explosion as an attack skill and not actually bind monsters.) Or binding Monsters simply become bound for 5-10 more seconds.
The intention of this skill would be to ultimately replace or be near Boomerang Stab in the end, but not until all 3 of these hypers were in place. Otherwise, it can be used purely as a bind skill. The cast speed I intended for this skill would be closer to Savage Blow as well, which most likely would replace Boomerang Stab if the Hypers were actually added and used. However, the max enemies hit is only at 8, while Boomerang could hit 10 if the +2 Enemy Hyper Passive was used.