You are playing campaign mode.

Setup: Each player may change hero cards without incurring the +1 threat penalty, and Haldan may be included among a player’s heroes. Any player gains control of Isolde. Add The Threat to Wilderland to the staging area, shuffle Dagnir’s Spawn into the encounter deck, and shuffle Abandoned Ruin into the Caves deck. If “Turayn has taken an oath of vigilance,” search the encounter deck for 3 treacheries and remove them from the game.

Resolution: While the Fire-drake has been vanquished, it was not the beast the heroes were sent to defeat. With the Fire-drake’s mother still at large, Isolde has resolved to continue the hunt. If the heroes choose to fight alongside her, add Isolde to the campaign pool (any player may add her to their deck). Otherwise, mark in the campaign log that “Isolde is on the hunt” (the dragon’s minions will pose less of a threat on your quest).

The players discover each treasure they control.

Add Abandoned Ruin to the campaign pool. The first player chooses either Threat to Wilderland or Dagnir’s Spawn and add it to the campaign pool.

The Fire-drake coughed and cackled, “Fools! When my mother learns of my death, she will set all Wilderland ablaze!”

There was a long silven as each member of the company reeled at the dragon's words.

“If that is true, then we must seek the mother before she hears of what has happened here, or else the Bardings and many more will pay the price for our victory,” said one of the companions at last.