Morphling was too hard to handle, with the shroud that kept it from being killed as well as the flying, untapping, and flowing
Serving as an easy draw engine in the command zone is strong in itself, but Marneus backs that up with an infinite mana outlet to boot
Kaito, Bane of Nightmares (Yes, we're aware this is a stretch on the definition we gave, but this clearly counts as a ninja)
This set brings a particular focus to multi-Energy Pokmon, as well additional support for Darkness and Metal Pokmon
Most decks run on pieces spread over a lot of different kinds of sets, making it hard to complete a set on pack openings alone
Ob Nixilis, Captive Kingpin Holy heck