Urdug's Assault
The Fate of Wilderland#168 (x1)
1A-B (-)
Setup: Add The Goblins' Assault, The Heroes' Defense, and Urdug to the staging area. Shuffle the encounter deck and discard cards from the top until X enemies are discarded, where X is the number of players in the game. Add those enemies to the staging area.

Dagnir is dead. In a move long-planned, Urdug has returned with an army of Goblins to lay claim to Gundabad and the Dragon's Wealth.
Forced: At the end of the round, place 1 progress on The Goblins' Assault for each enemy in the staging area. Then, if there is X or more progress on The Goblins' Assault, advance. X is equal to 2, plus 2 per player.

Goblins swarm up the mountain slopes and you fight to keep them back.