ok before the complaints of "OP NARAZ", I'd like to say that bind CAN be avoided....now for the jutsu.
I'm thinking something along the lines of a 50 chakra, 1 kunai cost jutsu that does between 100-250 dmg and has a 10-15% chance of putting whoever is hit into shadow bind. With that said i think it would be welcomed alongside a small nerf of shadow choke (not too much) and a slightly longer cooldown on bind (maybe 5 secs?). Also, a defensive jutsu of some sort would be nice...like a one shot shadow shield, maybe 150 chakra cost, and lasts 1-2 secs...idk, something like that would balance the clan out imo and make it more fun.