You are playing Campaign mode.

Setup: Shuffle Fateful Woords and Dark Doom into the encounter deck. Add Doom Mastered to the staging area.

Response: After Finduilas is placed beneath The Hopes of Nargothrond the players gain 1 fate.

Action: Remove X damage from Glaurung to gain 1 fate for the players. X is equal to 5 times the number of players. Any player may trigger this action.

"In the autumn of the year, biding his hour, Morgoth loosed upon the people of Narog the great host that he had long prepared..."
–The Children of Húrin

Resolution: Follow the instructions on Doom Mastered and record the number of damage or progress tokens on that card. If at least 1 damage is recorded, then add Dark Doom to the the campaign pool. If at least 2 damage is recorded, then add both Dark Doom and Fateful Words to the campaign pool.