Force of Will An essential card in any blue player's arsenal, Force of Will allows you to counter a spell for the price of an alternative card from your hand
Best Black Token Commanders (Marrow-Gnawer and Ghoulcaller Gisa) Theres not a lot to say about mono-black token decks black simply has the most hoops to jump through to make a token strategy viable in Commander due to limited token support cards, few ways to give tokens haste, and usually requiring effects that tap your commander to mass produce tokens, adding an extra turn to the buildup process
This is useful for tribes that have a very shallow pool of creatures to choose from, such as Trilobite, but it becomes less and less useful the higher the percentage of on-tribe creatures you're running
Felidar Sovereign deals 4 damage to Hazezon Tamar, so I gain 4 life
Better still are repeated effects, like Painful Quandary and Oppression, since most Commander decks these days will quickly rebuild their hand after a discard spell or two
Ghostly Prison , Windborn Muse , Otherworldly Escort , and Darien, King of Kjeldor are all very defensive in nature and intended to shift the enemy's gaze to other players