Secrets (6)

Setup a stronghold: You start in a fortified dungeon. Avoid breaking walls near points '3' and '6' as heroes behind locked doors will attack your Heart (dungeon core) if they detect a path. Confine yourself to the local area, excavate safe gold, dig out one side of double walls for space, build rooms (including a small Training room), and carefully select creatures.

Research the Guard Post & Bridge. Break through the wall on the western area, leaving the central tile directly west of your Heart intact. Build a Guard Post on this tile to prevent heroes at '3' & '6' from attacking. This central tile hides an excavated path; build a small bridge to claim it, then immediately sell it to prevent heroes from detecting you.

With the claimed path, safely excavate gold near '2', excluding the leftmost row if you want to avoid fighting weak heroes there. Alternatively, fight them for extra gold. Train 4 Mistresses to at least level 6, and use the remaining funds for research/manufacturing. You can attack points '1' to '6' sequentially to claim the "Heal" spell and approximately 100 gold pots (worth 25000 gold).

Break the game: Build a bridge towards point '10' and the "Increase Level" spell north of your dungeon. Ensure your dungeon is not externally accessible to prevent heroes from attacking your Heart. Dig just north of the door at '10' to the west to find a corridor with 24 Barbarians(5). Your Mistresses (level 7+) should handle them in small groups. You only need to engage the rightmost group, as others won't attack unless provoked. Consider leaving them to attack the blue Keeper.