If you are in the Overworld, do you have to walk back to your Dungeon manually?

[Dragon]

I'm new to playing this game and I just did the second mission.

It was a pain because due to the combination of the follow factors (at least, as far as I could tell, these things are true, but I could be wrong since I'm new to this game):

a) I couldn't build traps

b) I couldn't build a guard room

c) I couldn't set my minions to stand guard just inside the entrance to my Dungeon

d) I couldn't teleport back inside my Dungeon when Thalya and my whole army were in the Overworld

So...when the enemy heroes came into my Dungeon and pounded my Dungeon Heart, I was basically defenseless and had no counter-play.

Thankfully, their hits were weak, so I was able manually to move my army back and dispatch the heroes long before I lost.

But having to do that was still a pain, though. And if they sent large/strong forces, it would have been a big problem.

I thought taking over goodness zones and converting them into evil zones would at least give me a teleportation door back inside my Dungeon, but apparently not?

Am I missing something here?

Is there really no teleportation method back inside your Dungeon, as opposed to having to walk back to the entrance every time you attacked in your Dungeon while you are in the Overworld?

What are your thoughts about these things?

[The_Technomancer]

The campaign unlocks the various rooms and mechanics as it goes on. You'll get a portal spell and traps later on.

[JVC]

Begin unlocking the right-hand tech tree and move upwords on it. The portal spell is on the third "box" from the top. The menu to cast spells is located in the left-hand part of the screen and looks like a purple pentagram.

[Jet City Gambler]

He's only in the second level, so he doesn't have mana or spells yet. Just leave a couple of orcs behind to hold down the fort, the enemy forces invading aren't very powerful.