Witch's Vessel

The Witch's Vessel is a spherical crystal in the Crown of Sorrow raid that passes Witch's Blessing between players. A blessed player standing in the marked radius around a Vessel must damage it at roughly the same moment as an unblessed player. Anyone in the radius at that moment gains the blessing if they lack it, or loses it if they have it.

Teams repeat the hits so both states stay on the field, since blessed players can only damage one enemy type and unblessed players the other. A blessed player who holds the buff for about a minute receives a Witch's Curse and dies shortly after, so the swap has to happen before the timer runs out.