Hexblade

A hexblade patron was one possible sponsor for a warlock. If a bargain was made between a warlock and a being from the Shadowfell, the warlock's patron gave them access to certain powers, including a suite of spells that expanded the choices to fill their spell slots.

Hexblade Patron Expanded Spells
One of the benefits hexblades received from their patron was access to more spells from which to choose, beginning with the defensive shield and the offensive wrathful smite. After some advancement, the hexblade could choose to blur themselves with shadows or use branding smite to reveal an opponent hiding in shadow. Next, a hexblade warlock could use the blink spell to confound their enemies or charge their weapon with an elemental force for a time. At the next level of advancement they could learn to play mind tricks with phantasmal killer or staggering smite. And finally, when sufficiently advanced, a hexblade could infuse a weapon with enough power to blast a creature off the plane for a time or chill them to the bone with cone of cold.