Blue decks tend to be slow and patient, gradually building up card advantage and other resources until they're ready for the endgame, which is perfect for a midrange-oriented, moderately powerful format like Commander
Especially since the printings of Ragavan, Nimble Pilferer and Dragons Rage Channeler, the steal a casting cost 1 nonland-permanent mode has become very important and overall buffed the playability of the card
Lord Xander, the Collector Lord Xander, the Collector had its time in the sun when cheated into play by Sorin, Imperious Bloodlord
With a card like Weapons Manufacturing, you can easily sacrifice the Munitions tokens to deal damage and gain creature tokens
Tapping a Swamp for mana gives you double the amount of mask counters on it
Not only does it stop them from casting spells with even mana values, and that includes zero, but opponents also cant use Creatures with even mana values to block