Regardless of the opponents choice, if there is a monster in attack position at the time of declaring "End of Main Phase 1", the Battle Phase will be forced to start and a battle with one of your Yubel monsters will have to begin
Furthermore, Ninjitsu Art Tool - Iron Digger supplies the capability to turn any monster into a Ninja, such as Iblee for a Ninja Grandmaster Saizo play, or equipping it to your opponents monster, and Tributing it off for Dancing Leaves
The general feedback I received from other community members was that it happens. It Happens - mistakes, human errors, inconsistencies, bad players, incompetent employees, human biases, questionable tech, and inaccurate data happen. While I am all for going with the flow in many scenarios, if key improvements can be made at scale, should the major players of the industry not be actively trying to break the current status quo
if you know of a 1-mana black creature that ought to be on this list and isnt, let me know (nicely) in the comments!