I have no idea what skill is this but is a Revenant one. Everytime that skill is casted, create a red animation on the floor that is exactly the color you AVOID in a +100 people fight in WvW, and is annoying because you need fast reactions, and in the middle of a confusing battle of hundreds of people, that skill looks like the enemy zerg is attacking you, my brain reacts and want to evade the incoming damage. Please ArenaNet, never make a skill that create red things on the floor, thanks.