It speeds up your game plan by turning other players into your personal resource generators its one of the best Auras MTG for generating early-game mana
Having the tokens come in tapped, when you are also forced to swing with your other creatures to make the ability work, means youre not able to defend the Basri you just downticked
Furthermore, Smoke is simply annoying to deal with if you happen to have more than one creature on your side of the battlefield
Additionally, this seems like it can get out of control, with new creatures like ED-E, Lonesome Eyebot and Craig Boone, Novac Guard giving you massive benefits from the number of quest counters on them
I mostly avoided narrower cards on this list, especially the Knight tribal ones, since theyre not so broadly applicable