j) "AMBUSH" - Silverstream

You have 20 minutes before Lord Voss arrives from the west and exits to the east. You start with a small dungeon including lairs, hatcheries, treasury, and a workshop. A new creature, the Bile Demon, will join you immediately.

Quickly excavate space for a prison, torture chamber, training room, more lairs, treasury, and a library if needed. Mine the gem seam near the treasury if cash is low. Within five minutes, you should attract trolls, mistresses, and salamanders.

Observe the eastern and western guardrooms. Have your imps tunnel through the bedrock to the sides of these rooms. Capture the eastern guardroom first by building a wooden bridge to its side and having imps breach the wall. Drop creatures into the room to overpower guards and convert them. Aim to add four or five guards to your forces.

Repeat the process for the western guardroom. Have trolls and Bile Demons work on traps and doors. Fill the guardrooms and your dungeon with doors, sentry traps, and barricades. Lord Voss will attempt to break through these obstacles.

Optionally, capture the final, furthest guardroom by building a bridge and breaching it, or by leading a possessed group to break down its doors. Concentrate on training troops and laying traps in the final minutes. Controlling two guardrooms makes it unlikely Lord Voss will pass.

When Lord Voss appears with his fighting force after 20 minutes, if you didn't capture the last guardroom, he will pause there. As he moves towards your guardroom, drop as many creatures as possible into it and cast Thunderbolt upon him as he enters your land.

If you didn't capture the western guardroom, fight him in your dungeon. This may be tougher if he has more soldiers. Use traps and recruited skeletons to thin his forces. If his minions are dead, he will run towards the exit. Fill the eastern guardroom with barricades and traps to halt him.

Once Lord Voss is defeated, Horny will appear, and the ninth gem is yours.