Why do ghosts gather into groups? Simply because they are stronger in groups, groups they call Haunts. Whenever two or more characters decide to work together they can gain a bonus from each other. This bonus is only granted when both parties are willing to help each other; no one sided bonuses. The bonus is based on of the Conscience of the character granting the bonus, not the character getting the bonus. The bonus is one-half of the granting character’s Conscience score. In order to grant the bonus in the first place both characters must spend two points of Æther (two from the granter and two from the benefactor) , paid per roll. This opens up the two-way Haunt and gives both parties a bonus equal to the other character’s Conscience. Also, both parties must be able to see each other. Characters can form Haunts with as many other characters as they can afford to pay Æther for but they can never gather more than five dice from Haunt bonuses. This means the higher Conscience characters tend to form smaller groups than lower Conscience characters, simply because there is less benefit for it.  Below is a chart illustrating Bonus at Conscience level.