In reply to revanninja
Ah, rope darts, a classic. Only ones I've seen are traditional Chinese whips with weighted tips, equipped with a ribbon on the projectile to produce a distracting whooshing noise and to help the user avoid wounding themselves. Haven't seen any where the dart comes off. In fact, usually the "dart" is a steel ball meant to cause blunt force trauma. Rope tarts are sometimes also used to loop the projectile around a weapon or shield to hit the opponent, which is notably tedious, risky and exhausting. It gives more reach than a sword with more unexpected angles of attack, but sacrifices the power and control of a rigid weapon.
Selina's "dart" is highly reminiscent of the oh-so-famous (and wildly misunderstood) ninja throwing knives, or "kunai", popularized by shows like Naruto (even though Kunai were originally modified gardening tools from Okinawa, and like most other Okinawan ninja equipment, were a severe outlier of typical mainland Japanese "ninja" or Renja arsenal, but that's a history lesson for another time. Feel free to check out Metatron's videos on ninja weaponry and history if you're interested). That said, I think the dart's Kunai resemblance is more incidentally stylistic than a reference to ninjas, but considering her combat role in the show, I'm not sure. Either way, a fancy dust-filled knife dart brings more "pizazz" and excitement than a boring steel ball or rounded spike. All in all, a wonderful and welcome addition to the show's lore.
And yes, using a steel chain does make it less easy to use. With chain links, a sufficient pulse down the chain can cause a kinked section to reel the dart back in, making it extremely dangerous to the user. With a sufficiently elastic rope, you could get the same projectile reversal, but it's much more difficult to achieve, and vastly undesirable. The chain design sacrifices safety for durability, as a blow from a sword, halberd or other melee weapon is less likely to rupture a steel chain link than a rope.