Cyclades
Do Medusa or Polyphemus keep an island locked for the rest of the game?
The designer ruled that these figures last only until the buyer's next turn.
- Bruno des Montagnes · Designer · 2010-02-01
No. These figures do not stay all game. They leave at the start of the buyer's next god action, and their effect ends with them. Another figure placed on the same island also removes them. The Kraken is the one permanent creature.