Baba Yaga flies in a large mortar and pestle, which is immune to damage and can't be the target of spells or effects. It provides the witch partial cover from ranged attacks. Baba Yaga doesn't provoke an opportunity attack when she flies out of an enemy's reach. If Baba Yaga is knocked prone, stunned, or incapacitated while flying in the mortar, it will gently set her on the ground and disappear for 1 hour. The pestle remains with the witch.