Banned in multiple formats, the requirement to get multiple land drops in a single turn is trivial in the right deck, especially in formats where fetch lands are legal
This card can turn multiple artifacts into copies of other artifacts on the field, and if you target an artifact creature, those other artifacts will turn into creatures as well
This damage rate is pretty terrible for any Pokmon, let alone an ex , but its secondary effect allows you to attach 2 Metal Energy to any of your Benched Pokmon, making "Dialga ex" a strong support option for Metal and/or Colorless Pokmon
You can upgrade these to suit nearly any budget, and they can be taken in any number of different directions
This Pachirisu deck, for instance, also won big on the competitive scene