Dungeon theme/flavour:

If you rolled "Collision", your collision is between and .

Overmind:

The overmind is the "brain" of the dungeon, whether it knows it or not. It pilots the dungeon through the planes, and is at least somewhat responsible for its maintenance.

Keystone:

Most dungeons have a keystone, a thing keeping them attached to this plane. Dislodge, destroyed, or deactivate the keystone, and you can dislodge the dungeon to float through the planes - or destroy it altogether.

State:

Who inhabits the dungeon? A pristine dungeon is almost new: its inhabitants may have just wandered in here, or may have formed with it. There might be civilisations here, or their remains, or scavengers.

Dungeons may make several "dockings" with the same plane. You may encounter people similar to yourselves here.

Environment:

Reality isn't the same everywhere. How does reality differ inside this dungeon?

Threshold:

The threshold is the boundary between your world and the dungeon. How does it manifest?