Hedron Crab/Ruin Crab Our next mill specialist is a twofer because, well, they're basically the same card with different names and slightly different abilities
When this creature dies, you may put the exiled card into its owner's hand
Since non-basic lands exist, this is very easy to do, allowing Hermit Druid to be an incredibly consistent combo
If your opponent plans on casting a spell in response to Sudden Shock, such as Counterspell or Healing Salve, they'd better think again
But if we're looking at great artifacts that draw cards, Sword of Fire and Ice is amazing in its Jack-of-all-trades-ness: Even expendable fodder turns into a must-kill threat when wielding this fiery blade
1 Scavenger Grounds Commitment-Free Graveyard Hate Graveyard hate is essential in Commander, no matter what you're playing or expect to play against