A 3/4 with double strike that becomes hexproof whenever it attacks can also close games quickly - expect to see plenty of The Wandering Rescuer if there are enough small White creatures to build around
When it enters the battlefield, you draw four cards and lose four life, but you also get to instantly win the game if you control four or more Demons with different names at the beginning of your upkeep
10 Errant, Street Artist - Cheating And Stealing Errant, Street Artist is an incredibly cheap commander that is all about copying any target spell that you've cheated into play, whether that be through stealing cards from enemies, pulling straight out of your deck, or through copying permanents that were cast
If you were to pack one or two of these cards, they could pay for the box outright and then some, and then anything on top of this is pure profit, but you'll need to go through the effort of finding individual buyers, as submitting to a general buy list is often not going to get you the best price
It often seems like new commanders are over-the-top and provide a lot of instant gratification, but slow-burning value engines also have their own merits
