Halo 3 skulls??? ?

[spazz]

what exactly does each skull do??

 

[Booooooster]

Give me your gamertag. And I will tell you in-game.
(It's easier)

 

[xenoes07]

http://www.halo3planet.com/halo-3-skull-locations/

Go to this link and they'll give you the location and description of all the skulls.