Heart of the Swamp

Heart of the Swamp is an event quest in Fallout 76.

Detailed walkthrough
Fight and destroy a strangler heart and its mirelurk and feral ghoul reinforcements in the Mire. Avoid the heart's poison 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.