Black Lotus combines the accessibility of a Spirit Guide, the flexibility of Dark Ritual, the synergies of the Moxen and the profitability of a full-powered Cabal Ritual with no setup required
Legendary Artifact - Vehicle Artifact (CTRL to add secondary) Creature Bronze Guardian Double strike Ward (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .) Other artifacts you control have ward
These are always welcome, as they make it far easier to get hold of important Commander cards and drive down the price of purchasing them as 'singles' on the secondary market
Social Climber's alliance ability can stack with other lifegain triggers, allowing for massive amounts of life to be gained in just one turn
Imakuni?'s Doduo (#112/108) and Here Comes Team Rocket
Getting an extra card every other turn is great, and getting three additional mana every other turn is also great