Here's the scenario (I hope I get this right by the rules): last turn, I summoned my Dimir Keyrune onto the battlefield. This turn, if I transform it into that "2/2 blue and black Horror artifact creature", I'll be able to attack with it. It will be unblockable, making it a good candidate for a Cipher spell. The transience of it being a creature, however, is a problem.
- Whilst it's temporarily a creature, can I cast Paranoid Delusions and then encode it onto the Dimir Keyrune using Cipher?
- When the Dimir Keyrune stops being a creature, what happens to the Paranoid Delusions encoded on it? Does Dimir Keyrune remain encoded? This would mean, I think, that in the future, transforming it back into a creature would mean I could attack with it and potentially cast Paranoid Delusions.