To create a magic
ring, a character needs a heat source. He also needs a supply of materials, the most obvious being a
ring or the pieces of the
ring to be assembled. The cost for the materials is subsumed in the cost for creating the
ring.
Ring costs are difficult to formularize. Refer to
Table: Estimating Magic Item Gold Piece Values and use the
ring prices in the
ring descriptions as a guideline. Creating a ring generally costs half the ring's market price.
Rings that duplicate spells with costly material or XP components add in the value of 50 x the spell's component cost. Having a spell with a costly component as a
prerequisite does not automatically incur this cost. The act of working on the ring triggers the prepared spells, making them unavailable for casting during each day of the ring's creation. (That is, those spell slots are expended from his currently prepared spells, just as if they had been cast.)