A) Solve someone else's problems
A) Cause a problem and be forced to fix it
B) Learn about where demons come from
B) Learn about demonic limitations
C) Learn more about where your powers come from
C) Learn more about the history of warlocks
D) Solve puzzles
D) Defeat monsters
I think this part where you need to consult your minion over what it might be is a pretty genius piece to bring a bit more life to them. More of this please.