What are level 80 statues in last fortress?

Excuse me, could you please clarify what exactly are level 80 statues in Last Fortress? Are they a type of upgrade or reward system within the game? Are they special items that players can acquire and use to enhance their fortress or defense capabilities? I'm curious about their significance and how they impact the gameplay. Can you elaborate on the mechanics behind these level 80 statues and what benefits they provide to the players who possess them?