Tactics for Dungeon.

Playing as Dungeon is a real drag; it has a weak castle and builds slowly. And Dark Dragon isn't just about immunity; it also means no resurrection.

But you don't have to build. Here's a classic example that's been discussed many times:
Start with Shakti.
Hide dragons.
With the tactic, we take, buy a dragon, place a portal, and buy another dragon there.
By the second week, with 4 dragons, you can survive.