With Glyphs, if Dark Premonitions remove all red cards after two red Doors are found, how do you get the third red Door?

Question

Accepted Answer

Hold a red card, ideally a red Key, when the Premonition triggers, or use a Glyph to get the door. Some players house-rule it to trigger on the last red Door.

Onirim (Second Edition)

With Glyphs, if Dark Premonitions remove all red cards after two red Doors are found, how do you get the third red Door?