Cool

This subtype contains creatures which are immune to cold-based attacks, and vulnerable to heat-based attacks.  Creatures in this group include white dragons, for example.

It is essentially identical to the Cold subtype in official sources, but I renamed it for the Xaeyruudh campaign so that it would more accurately mirror the Warm subtype which I invented to disambiguate the Fire subtype.  Confused?  Don’t be.  Just replace Cold with Cool.