So I was wandering along in Hell today building myself a nice bridge ready to kill the WOF, when suddenly above me I noticed some nice blue bricks. Upon closer inspection I realised that it was actually the very lowest point of the dungeon. I tunnelled through and so now have a (handy?) back door into the dungeon but it got me wondering:

If I hadn't already killed Skeletron, what would have happened? I assume I'd be killed at some by the guardian things, but where? I had to tunnel through a fairly thick wall so at some point half way through the wall would I suddenly become "in the dungeon"?

1 Answer 1


According to the official Terraria wiki, you should avoid getting too close to the dungeon from underground, if you haven't defeated Skeletron yet.

Deep caves and Chasms near the Dungeon should be avoided until Skeletron is defeated, as having a significant portion of the Dungeon on-screen below zero depth is considered being inside it, and Guardians can therefore still spawn.

This means that you do not need to actually be inside the dungeon for the Dungeon Guardian to spawn. The reason for this, is because the Dungeon is not a closed space; in my world for instance, the dungeon was generated with a patch of dirt separating two patches of wall, so I could've entered the dungeon without actually digging through its wall.

  • Mostly you do have to actually be inside the dungeon, but there's a "sweet spot" (low enough for the Guardian, but high enough for dirt background walls) where merely going near will kill you. This is because the game recognizes the dungeon as "lots of dungeon bricks nearby and player in front of unsafe background".
    – a cat
    Commented Jul 12, 2013 at 5:16
  • Actually, as long as you build and keep a wall that you have built all around you as you go into the dungeon, the guardians won't actually spawn.
    – Michael
    Commented Sep 12, 2016 at 17:18

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