Creatures can't support themselves, which is kind of sad, but it means that if the ability that tells you to support is found on a permanent, the support ability can't target that permanent
At times, though, their own demand for the card has apparently pushed it out of their price range, and they've had to wait for a while for it to settle back down
ANY INSTANT/SORCERY COPYING EFFECT + ANY OTHER INSTANT/SORCERY COPYING EFFECT If you have a permanent with Magecraft in play, and you copy a spell with any spell-copying effect like Twincast, you can then copy your Twincast with another spell-copying instant or sorcery like Reverberate
Its the set that gave us Nissa, Resurgent Animist, Tyvar the Bellicose, and Ob Nixilis, Captive Kingpin
You then get to retrace all your nonland permanent cards on your turn, discarding that land you got back to cast a spell from your graveyard by paying its mana cost
Additionally, there are parallel versions of the cards included in the bonus pack