The Ring of Dragonshape text says
My DM's telling me that I should only be able to polymorph into a wyrmling dragon, according to the CL. Thoughts?
Once per day, the wearer can activate the ring (as a standard action) to polymorph into a young, red dragon (if the wearer is evil) or a young, gold dragon (if the wearer is good). This effect functions as the polymorph spell, except that the duration is 1 hour. The effect can be dismissed by the wearer as a standard action.
Moderate transmutation; CL 7th; Forge Ring, polymorph;
Price 23,000 gp.
My DM's telling me that I should only be able to polymorph into a wyrmling dragon, according to the CL. Thoughts?