Just found out today that we can actually make a triangle (or circle if you have more PLDs) with cover! But if everyone is covered, who takes the damage? We postulated that the damage taken by Person 1 will be transferred to Person 2, but that damage will not be further transferred to Person 3. Yet if Person 2 gets injured directly by something, that injury will be transferred to Person 3. We haven't actually tested it, but it seems the most sensible guess. We also tried having 2 people covering the same 3rd person. But we found that it won't work. When the 2nd cover happens, it cancels the first. So one person can only covered by one person.