Pact of the Vengeful
Prerequisite: The Forgotten Patron
At 3rd level, your patron lends their aid when you confront the marked target of your Vengeance Covenant feature.
You have advantage on any ability check or attack roll made to thwart or harm the marked target, and on saving throws to resist the marked target's spells and abilities.
Eldritch Invocations
The following eldritch invocations are available to warlocks with this Pact.
Best Served Cold
Prerequisite: 5th level, Pact of the Vengeful feature
You gain advantage on saving throws to resist the charmed and frightened conditions and to resist any spell or special ability that attempts to modify your emotional or mental state such as Calm Emotions or Enthrall, or to modify your behavior such as Confusion.
Chains of Vengeance
Prerequisite: 5th level, Pact of the Vengeful feature
You can cast Ensnaring Strike once using a warlock spell slot. You can't do so again until you finish a long rest. When cast by you in this way, mystical barbed chains are conjured instead of thorny vines, but other than this cosmetic variation the spell works exactly the same.
Eldritch Vengeance
Prerequisite: 5th level, Eldritch Blast cantrip, Pact of the Vengeful feature
Once on each of your turns when you hit your marked target with your eldritch blast, the target must make succeed at a Wisdom saving throw against DC 10 + half your class level (rounded down) or suffer the frightened condition until the end of their next turn.
Hidden Vengeance
Prerequisite: 5th level, Pact of the Vengeful feature
You gain proficiency in the Deception and Stealth skills. Once per short or long rest you may gain advantage on a check with either skill.
Lesser Mark
Prerequisite: 5th level, Pact of the Vengeful feature
You can cast Hunter's Mark once using a warlock spell slot. You can't do so again until you finish a long rest.
Vengeance Bane
Prerequisite: 5th level, Pact of the Vengeful feature
You can cast Bane as an action at will, without expending a spell slot, and without an arcane focus or spell components.
Vengeance Never Sleeps
Prerequisite: 5th level, Pact of the Vengeful feature
You no longer need to sleep and can't be forced to sleep by any means. To gain the benefits of a long rest, you can spend all 8 hours brooding, plotting, on a stake out, keeping watch, or other light activity.
You Picked The Wrong Boss
Prerequisite: 7th level, Pact of the Vengeful feature
You may treat the hirelings, lesser henchmen, employees, household servants, and other inconsequential flunkies of the marked target of your vengeance covenant as if they are also marked targets for purposes of all relevant features.
And Your Little Dog Too
Prerequisite: 7th level, Pact of the Vengeful feature
You may treat the lieutenants, primary henchmen, animal companions, and similar close associates of the marked target of your vengeance covenant as if they are also a marked target for purposes of all relevant features.
Every Last One
Prerequisite: 15th level, Pact of the Vengeful feature
When you gain this invocation you must select one background affiliation of the marked target of your vengeance covenant; this could be their race, nationality, religion, blood relatives, organization membership, military branch, or any similar affiliation...but only one of them, and the DM can veto any suggested affiliation at their discretion. You may treat any creature who has the selected affiliation as if they are also your marked target for purposes of all relevant features.