Take over the pyramid by hopping from cube to cube. All non-standard rules are documented on the board itself.
You can completely abandon a cube and it stays under your control.
It is harder to travel up than down. An exception to this are the cubes occupied by the denizens of this strange land.
Take a ride on a flying disk to get back to the top of the pyramid and get a view of the board along the way!
Math
-1 to attack - expected loses of about 1.42 attackers per defender
no bonuses - expected loses of about 0.85 attackers per defender
+1 to attack - expected loses of about 0.48 attackers per defender
+2 to attack - expected loses of about 0.32 attackers per defender