The "Pact of the Blade" is a feature available to the Warlock class in the Dungeons & Dragons role-playing game. This ability allows a Warlock to create a magical weapon, known as a Pact Weapon, which can take the form of any simple or martial weapon. The Warlock can summon this weapon at will, making it a versatile tool in combat. Additionally, the Pact of the Blade grants the Warlock the ability to use their spellcasting ability for attack and damage rolls with their Pact Weapon. This feature enhances the Warlock's effectiveness in melee combat, allowing them to blend spellcasting and physical attacks seamlessly.