Mors Internum

Mors internum is the incantation to Antonin Dolohov's Curse. This curse causes fatal internal damage, however leaves no sign of external death. The wand lets out a streak of purple flame that hits the target with a strong force. If this spell is cast non-verbally, it can still cause damage, however it would not be fatal.

History
This spell is commonly referred to as Antonin Dolohov's Curse because he is the Dark Wizard who created the spell and uses it the most against his victim and uses it the most during his duels. He has believably killed two people with this spell (Nymphadora Tonks and Remus Lupin).

Latin Origin

 * Mors - Death
 * Internum - Internal