You are playing campaign mode.

Setup: Each player may change hero cards without incurring the +1 threat penalty, and Amarthiúl may be included among a player's heroes. Then, each player in turn order may select one of the following boons and add it to their opening hand: Elrond's Champion, Lore of Ancient Arnor, Raiment of the Second Age, or Rivendell Skirmishers. Add the chosen cards to the Campaign Pool.

Resolution: Note the amount of damage on each hero at the end of the game.

As the heroes slew Thaurdir, his remains crumbled and decayed into ash before their very eyes, and his armor and weapon clattered to the ground harmlessly. But before they could rejoice in their victory, the howling of wolves sounded in the air, as if all around them.
"Goblins!" one of the Rangers in the rear ranks shouted, "Goblins from Mount Gram!" The company found themselves assaulted from the south by Goblins while the Orcs of Carn Dûm rallied their defenses once more. They had but a moment to slip into the fortress before they were surrounded on all sides. One of the Elves that had accompanied them from Rivendell turned to the heroes with a grim expression and shouted over the clamour of battle, "You must make your way into the fortress and stop Daechanar's ritual!"