Heart of the Swamp

Heart of the Swamp is an event quest in Fallout 76

Quick walkthrough
Fight and destroy a Strangler Heart and its Mirelurk and feral ghoul reinforcements in the Mire. Avoid the Heart's poision gas and take down the boss (usually a Strangler Queen, with a 50% chance to be a Mirelurk Queen or Grafton monster) that appears when the Strangler Heart is at 25% health.