592
please tell me
Well, a tetrahedron has four sides. A regular tetrahedron is a triangular pyramid.
A tetrahedron must be plane faced and so, it is just an ordinary tetrahedron.
A Tetrahedron. The most common form of a tetrahedron is called a regular tetrahedron, or a pyramid
its not that one
what is it
Guardian tower.
necromancer tower
You buy it. At the battle tower.
near your hometown
During the course of the KOTN quest, you do get a small stronghold which acts as a base for the new Knights of the Nine order. It does not add any other obtainable buildings though.
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592
its not that one
I am not a tetrahedron!
The hexagoon