A little Spoiler
So remember that in every ancient power there is a test or some kind? When Cale is trying to get the Rock ancient power the test is an Illusion of your nightmare something like that.
So Cale's Illusion started him being the Count of the territory, then realizing all of his companions and families are gone, then he goes to one of their base (like a mansion under ground) then in each room he saw items of his ally, lying on their own bed. Like Beacrox sword, Ron's Knives, Rosalyn staff something like that. Then when he goes to his room which is in the highest floor, he saw the three piggy banks Raon, On and Hong use to keep their allowance from Cale lying on bed. This shows that everyone is gone and only Cale survive. Which is his nightmare, being left alone and not saving everyone (even though he won't say it)
Pocket money for the children.. ༎‿༎ i can never get over that anymore