The player places the Igloo under one of their own Pawns. Pawns in an Igloo cannot be ambushed, but they also cannot ambush from an Igloo. When the Pawn leaves the Igloo, it gets discarded. An Igloo cannot be placed on the weak ice around the North Pole.
Players can choose to stay in the Igloo as long as they wish, if they have other Pawns to move.
Igloo can be broken with a Pickaxe.