Urza, Chief Artificer Probably the best affinity commander in the game, Urza, Chief Artificer focuses on curving out with cheap artifact creatures like Esper Sentinel, Ethersworn Canonist, and Master of Etherium to make Urza itself cheaper
Her +1 will let you scry while also hitting everyone else for a damage
Her +1 ability to return a target land from your graveyard to your hand will allow you to ramp up on mana consistently, especially while running lands like Fabled Passage
This card can be acquired through the Steel and Sapphire starter deck, so it's not all that rare
Thats neat if you want unique versions of your favorite cards
The Council of Four triggers off opponents drawing extra cards or double-spelling during their own turns, but you can also benefit from its abilities during your turn