If five or more mana was spent to cast that spell, that player mills ten cards instead
Addendum If you cast this spell during your main phase, you may put a permanent card with mana value 7 or less from your hand onto the battlefield
If your planeswalker commander has red in their colors, like Dihada or Jared, you should consider cards like Disrupt Decorum, Geode Rager and Baeloth Barrityl, Entertainer
Roiling Vortex is also a good source of 1 damage, and it lets you pay to shut down lifegain
Released in October of 2003, Mirrodin is set in the realm of Mirrodin, a plane created by Karn and eventually populated with individuals kidnapped from different planes by Memnarch, a creation of Karn made from the Mirari (Who got infected by some Phyrexian oil Karn had stuck to him from Invasion)