Still, as far as creatures go, Gurmag Angler and Tasigur, the Golden Fang are pretty mana efficient (and its not like Tombstalker is a slouch, either)
Of course, Commander decks can be ephemeral things
It doesn't stop all spells, but it stops enough of any modern deck based on spells that if he sticks they'll be stuck with a hand full of useless cards, and those spells will naturally be the most powerful ones available
Collect the Infinity Stones: The Soul Stone "Within your grasp rests the infinite !" The Soul Stone appears in three cosmically cool versions throughout Magic: The Gathering | Marvel's Spider-Man
If you can get nine or more Snow lands this becomes great in Limited
John Silver is a three-cost, inkable character with three Strength and Willpower