Some sauropods, such as Diplodocus or Dinheirosaurus, had extremely elongated tails that may have been used as whip-like defensive weapons. Some paleontologists even speculate that the sauropods could have cracked these tails to emit a sound similar to a bullwhip.
A lot of people have proposed a Hatewatch, but I think a villain team is too easy a concept. I don’t know about you, but these thieves, tricksters, and assassins are a team I would love to see come together as the original TakeWatch. “For the coin in your pocket, I will TakeWatch.”
I would complete the cycle of enemy-colored Planeswalkers, but white-red tends to be a bit too uptight for this group. And Nahiri is probably a smidge too crazy for their tastes.