@JeremyECrawford A mummy w/ a Ring of Fire Resistance: how does it interact w/ mummy's fire vulnerability?

— Trevor Holland (@imnotasnowflake) March 26, 2016

You apply resistance and then vulnerability after all other modifiers to damage (see PH, 197). #DnD https://t.co/DL1hvU4vO6

— Jeremy Crawford (@JeremyECrawford) April 1, 2016