Prisons (or magical prisons) are very rare structures on this game. Though prisons can take damage and be destroyed, they share a lot of attributes with stone heads in that they cannot be set on fire and will not be submerged if the land beneath them is sunk. A Shaman can be trapped in a Magical Prison only if placed there at the start of the game (like it happens on level 15). While within a prison, a Shaman cannot be selected or cast any spells. A shaman freed from a prison will continue to Reincarnate in the location of the prison for the rest of the game - but will not create a reincarnation site around.

Magical Prisons can also exist without a shaman inside, in which case they act like walls as seen in other games like the popular Age of Empires series. In some levels, prisons contain units or stone heads inside, therefore the players will need to get rid of the prison first to reach it.

 

Casting light (and sometimes other spells) in a prison might resync the game, so avoid doing that. 

The worldview's icon for the prison is a large white prison shape.

There are some online nice levels designed based on this special object - this levels require different gameplay since you have no shaman, so you have to make fast troops.