The Four Factions of Lego Universe each give you exclusive abilities.

The four factions of the Lego Universe were founded by the four members of the Nexus Force and collect the strongest and most imaginative LEGO minifigures in the universe. Aligning yourself with one of these factions grants you access to unique abilities. Whether you like building, fighting, exploring or turning your enemies against each other, you'll find a faction that fits your play stye.

Check out the video below from LEGO Universe's website to see the factions explained.