Building a good boss to threaten the players can be difficult, and some powers may be hard to represent without players crying to check the rules. These serve to present rather powerful abilities the GM can use in the middle of combat, or over the course of the campaign to make things interesting. Ultimately, everything is subject to the GM anyways and the enemies can have other strange and unique abilities the players don't have, however these act as a consolidated list of powers to make things more interesting.
There is no EXP cost for any of these powers, however it is recommended that minor boss enemies only possess a handful of these powers. None of these powers can be taken multiple times.