Having no mana cost represents an unpayable cost (see rule 117.6)
Fevered Visions Howling Mine variants like Fevered Visions have downsides, namely in giving your opponents cards, but theyre also exploitable
Quantum Riddler and Possibility Technician Im putting these together since they play a similar role, as cards that virtually draw a card if warped, especially in low-curving decks that can look to reliably cast the card from Possibility Technician/draw 2 with Quantum Riddler and something that can just get cast later
I understand where you're coming from, but you also have to keep in mind that GameStop has never done anything like this before and a lot of things can go wrong
If you do, create a 1/1 white Spirit creature token with flying
That seems unlikely, given that the much cheaper Porphyry Nodes sees very little play