Here are 3 new Megaliths to add to the Megaliths contained in the base game.
1. The walk of the colossus: Switch the position of one of your shamans with one of your opponent's shamans. This action does not activate any Megaliths.
2. The shifting stone: Duplicate and apply the effect of one of the available Megaliths.
3. The heart of the Earth: Build one of two available Megaliths in one of the empty squares of the play area. This action does not increase your score. (Don't forget to replace it with a new megalith.)
Additional note in the rulebook:
If an action moves or adds a shaman onto a megalith, it immediately activates its effect. If this resolution causes a shaman to move or add onto another megalith, it will then activate its effect.