From Guild Wars 2 Wiki
- Effect type
- Game link
Unseen Burden is an effect constantly applied to players during the encounter with Cairn the Indomitable. Stacks can be removed by standing in the green purifying circles but additional stacks will be applied if not enough players are in the circle. At 99 stacks, players will be unable to move or use any skills except Celestial Dash if the challenge mote has been activated.“
Slows target 1% movement speed per stack. Stacks up to 99 times. Petrifies target at 99 stacks.
— In-game description