Pact of the Blade

The Pact of the Blade was a type of pact between a warlock and their patron in which the warlock received a distinctive weapon.

Abilities
The warlock could create the magical pact weapon in their hand at will, with its type chosen each time it was created. They could only create melee weapons, but more veteran warlocks could master a certain eldritch invocation that allowed them to creating bows and crossbows of various forms. Moreover, such a weapon became lightly enchanted and could be used as a spell focus. If the pact weapon was out of the warlock's reach for more than a minute, it would vanish, but the warlock could simply summon another. It would also vanish if the warlock willed it, summoned a different weapon, or died.

With other invocations, a warlock's pact weapon could drink the life-force of those it struck to inflict more serious injuries, or they could move and attack twice as often with it than was normal.

History
In the 15 century DR, Pact of the Blade warlocks could be found in parts of the Sword Coast.