Self-Milling puts cards into your graveyard, but to what end? Are you looking to completely deck yourself out? Do you want to fill the graveyard and use it as a second hand due to several keywords and mechanics you can cast from the graveyard? Are you looking to cheat on casting costs by reanimating high mana value bombs?

Even without a voltron player at the table, when’s the last time you had a game without Lightning Greaves, Swiftfoot Boots, Shadowspear or any of the ‘Sword of’ cards getting played? Sure, their commander can have hexproof or shroud, but chances are high the equipment will not!