Morsmordre

To cast a Dark Mark into the sky

Type

Incantation

Purpose

To cast a Dark Mark into the sky

The effect it has on the recipient

Casts a giant skull with a serpent's tongue into the clouds for all to see

Famous moment a wizard or witch uses it

Barty Crouch Jr. sets a Dark Mark over The Quidditch World Cup to signify a Death Eater attack