Praetor

The Praetors are the five leaders of New Phyrexia in Magic: The Gathering, coming to power after Phyrexia's domination of Mirrodin was secured by tourneyfags everywhere.

• Elesh Norn, Grand Cenobite: The white Praetor and /tg/'s eldritch Phyrexian waifu. You probably came here from her page. Leader of the Machine Orthodoxy, which is essentially the bastard Phyrexian child of the Ecclesiarchy (or possibly the Inquisition).
• Jin-Gitaxias, Core Augur: The Blue Praetor. Leader of the Progress Engine, the faction religiously obsessed with machines, knowledge, and "progress".
• Sheoldred, Whispering One: The Black Praetor. Leader of the Seven Steel Thanes, and runs her faction as a callback to vintage Phyrexia. Kicked all sorts of Mirran ass, including (presumably) taking out Koth.
• Urabrask the Hidden: The Red Praetor. In charge of New Phyrexia's industry. He also sheltered the shattered remnants of the Mirran resistance, because exposure to red mana makes you a total bro in Phyrexia. With a CMC of five, he is the closest thing to playable that the Praetors get outside of EDH.
• Vorinclex, Voice of Hunger: OM NOM NOM NOM NOM NOM NOM NOM NOM NOM NOM NOM.

Crunch-wise, they all give their controller some useful effect and their controller's opponents something vaguely the opposite of that effect. However, their ridiculously high mana costs tend to make them unplayable in anything other than EDH.

There are two other creatures with the "Praetor" type in MTG, but nobody really cares about those guys.