This Ritual causes a retributive strike of pure magical damage to anyone who inflicts a Killing Blow against the Target. This damage is 10 points per rank of Formal Magic possessed by the Caster and is not avoidable in any manner.
The Target cannot choose not to use their Vengeance and a Killing Blow does not need to be effective (Target is immune to the weapon used, already dead, etc) for the Vengeance to be triggered. To use this Ritual, the Target states <Number> Vengeance when affected by a Killing Blow.
This Ritual has a number of charges equal to half the number of levels of Formal Magic possessed by the Caster rounded down.