Rat King

Rat King is an exotic kinetic sidearm in Destiny 2. It's main perk is Rat Pack, which causes the gun's power to increase when more players with Rat King are nearby. Rat King is acquired by completing the Exotic Quest Rat King's Crew, which is unlocked after completing the Titan World Quest.

Lore
We are small, but we are legion.

The stories are passed from child to child, whispered in the streets and on the playground like any good legend. “Don't ever venture beyond the wall and sight of the Tower,” parents warn, citing these cautionary tales that speak of the boy's many deaths. Exposure. Hunger. Sickness. Cutthroats. Living nightmares. And on. And on. The children, however, have their own truths. To them, the boy never died. They call him the Rat King. The children believe he leads the forgotten among them out of the City on grand adventures. They say he and his misfit army saved the world. But children say many things, and the Vanguard maintains their official stance: there is no Rat King and his army never existed. That's what the elders believe. I choose to believe otherwise.

Weapon Mods
Black Plague - Equip this Weapon Ornament to change the appearance of Rat King.

Trivia

 * Rat King is named after an aprocyphal phenomenon called a Rat King where several rats have their tails fused together. Mythologically it is treated as a single organism and an omen of bad luck, due to rats association with disease.
 * The initial lore description is also a reference to the Book of Mark (5:9) in the Bible.

List of appearances

 * Destiny 2