Are you the dream of a sleeping god? Or the nightmare of a dead one?

Changes the appearance of your respawn for 2 hours.
― In-game description

Flight of Shadows is a consumable that changes a Guardian's respawn animation to include a swarm of bats. The effect lasts for 2 hours and a Guardian can have stacks of up to five in an inventory.

During Halloween 2014, it could be purchased from Xûr for one Strange Coin if the Guardian talked to him while wearing a Jackolyte.

During the Festival of the Lost for Halloween 2015, they were dropped at random in bags of candy.