In GURPS 4th Edition Magic, several spells have mana cost multipliers that apply in certain conditions. For example, the Stone to Earth spell has multiplier 2 for transforming metal to earth. The spell also has minimum mana cost 6. When transforming metal to earth, is the minumum cost still 6, or is it multiplied to 12?
Stone to Earth Regular
Turns any kind of stone (including gemstone) into simple earth. Must be cast on a whole stone or block, rather than a part of it. This spell also transmutes metal into stone, or transmutes metal into earth for double cost.
Cost: 6 per cubic yard (minimum 6).
Prerequisites: Earth to Stone or any four Earth spells.
Other Earth spells that also have a minimum cost and multipliers are Earth to Stone and Shape Earth.