Factions: The Ludi of Arena Rex
In Arena Rex, our game factions take the form of famous ludi that inhabit our world. These ludi serve as soft factions as Arena Rex has very open force construction rules. When constructing a gladiator cohort to fight in the arena you may take any mix of gladiators and beasts you desire. There are bonuses for keeping mostly within a single ludus (3/4 of your gladiators).