Everyone who has a Morale/Magic/Power pool has an initial amount and things which charge or drain it. Things which drain it are often a rolepower, like:
Night Kill: (Y) You can [blah, blah, brutal homicide, blah]
The Y indicates the amount of morale drained per use. You cannot go into the hole either, if something cost 2 points and you've got 1, no use. There are items and events through out the game that can add to someone's pool.
- Albert Einstein
King of Cairhien 20-7-2
Chancellor of the Landsraad, Archduke of Is'Mod