Consider this Part 2 from What happens to objects, changed while transmuted using Minor Alchemy, after they revert?
This is regarding the School of Transmutation wizard's Minor Alchemy feature (PHB, p. 119):
Starting at 2nd level when you select this school, you can temporarily alter the physical properties of one nonmagical object, changing it from one substance into another. You perform a special alchemical procedure on one object composed entirely of wood, stone (but not a gemstone), iron, copper, or silver, transforming it into a different one of those materials. For each 10 minutes you spend performing the procedure, you can transform up to 1 cubic foot of material. After 1 hour, or until you lose your concentration (as if you were concentrating on a spell), the material reverts to its original substance.
Specifically, with spells like Mold Earth (can manipulate stone/earth, changes last 1 hour), or Meld Into Stone (put body and belongings into stasis within a "coffin" of stone), what happens when the stone that you're working with was transmuted from wood and reverts back?
In addition, Fabricate states that the quality of the finished product depends on the material used, but does transmuting cheap wood to silver mean that I end up with a high quality silver product followed by it reverting to a high-quality wood product?
I guess, to simplify this question, assuming I'm converting wood into stone via Minor Alchemy: When I cast a spell that requires stone, does my spell:
- Fail immediately (as I'm not using a proper material)
- If this is true (I can't turn wood to stone, because it's not real stone), could I turn stone to wood and treat it as a stone material?
- Fail the moment Minor Alchemy ceases (as I'm no longer using stone)
- Continue to attempt the magic on the reverted material as normal (like with Mold Earth, magically ending up with colored, shape-shifted wood for the next hour)
- Some other event