Prerequisite: 7th level, Pact of the Talisman feature
When the wearer of your talisman fails a saving throw, they can add a d4 to the roll, potentially turning the save into a success. This benefit can be used a number of times equal to your proficiency bonus, and all expended uses are restored when you finish a long rest.
Prerequisite: 5th level, Hex spell or a warlock feature that curses
As a bonus action, you cause a psychic disturbance around the target cursed by your Hex spell or by a warlock feature of yours, such as Hexblade's Curse and Sign of Ill Omen. When you do so, you deal psychic damage to the cursed target and each creature of your choice within 5 feet of it. The psychic damage equals your Charisma modifier (minimum of 1 damage). To use this invocation, you must be able to see the cursed target, and it must be within 30 feet of you.
Prerequisite: Eldritch Blast cantrip
Once on each of your turns when you hit a creature with your Eldritch Blast, you can reduce that creature's speed by 10 feet until the end of your next turn.
Prerequisite: Pact of the Blade feature
You can use any weapon you summon with your Pact of the Blade feature as a spellcasting focus for your warlock spells.
In addition, the weapon gains a +1 bonus to its attack and damage rolls, unless it is a magic weapon that already has a bonus to those rolls.
Finally, the weapon you conjure can be a shortbow, longbow, light crossbow, or heavy crossbow.