We're taking a two-week holiday break and will be back with new stuff on Monday, January 2, 2012. Until then, please enjoy our favorite Arcanas of 2011. This article originally ran February 10, 2011.
Art Description
Color: Black creature
Action: We'd like you to show us this world's version of the creature called "Phyrexian Rager". Reinterpret it through the lens of the styleguide. (Don't include the blue-skinned humanoid in the reference.)
Focus: the Phyrexian rager
Mood: It's fascinated by how you experience pain.
Notes: This is a purely Phyrexian creature.
Because the world had already seen a Phyrexian Rager in Apocalypse, there was an art reference for Stephan to work from. Here's what the original rager looked like.
Apocalypse

Phyrexian Rager | Art by Mark Tedin
Mirrodin Besieged
Stephan's version focused more on the rager and didn't include a victim. It still seems pretty menacing, don't you think?

Phyrexian Rager | Art by Stephan Martiniere
Finished Card
And here's what it looks like in Mirrodin Besieged packs: