Ouroboros

When choosing the Ouroboros, place a Marker, in the Ice ring on your Transformation cycle (Eternity marker).

You cannot upgrade the Spade track. You need to pay Priests (instead of Workers) when transforming Terrain spaces. Pay 1 Priest for each step of transformation.

Ability: Each time you get 1 Victory point, move the Eternity marker 1 space clockwise. Do not move the Eternity marker if you spend Victory points. When the Eternity marker returns to the Ice ring, you get 1 Priest from your supply. (In other words, the Ability to get 1 Priest for every 7 Victory Points you get during the game. The location of the Eternity marker simply indicates how many Victory points are left before getting the next Priest, never give changes to your Starting terrain or the number of Spades for transformation.)

Stronghold: Immediately and only once, get 1 Priest. And then, immediately and only once, you may send any number of Priests to the Cult board in the same turn.

Others: Each Temple has an Income of 1 Victory point.