The Beast of Belegost
The Ruins of Belegost#7 (x1)
4A-B (-)

When Revealed: Add Naurlhûg and Naurlhûg%27s Lair to the staging area. Shuffle the Sword of Belegost, and the encounter discard pile into the encounter deck.

After fleeing the breaking of Thangorodrim, the great worm Naurlhûg hid itself in the ruins of Belegost. The fire dragon hoarded the wealth it found there into a giant, golden bed at the center of a large, underground lake. If you wish to claim the treasure for yourself, then you must slay Naurlhûg.

While Naurlhûg's Lair is in the victory display, Naurlhûg loses the text: "Cannot take damage."

Forced: After Naurlhûg attacks, if it was dealt a shadow card with no shadow effect, it engages the next player. Then, it makes an immediate attack. Do not deal it a shadow card for this attack.

When Naurlhûg is defeated, the players win the game.