Arguably the best card draw effect that white has access to, Esper Sentinel does have the limitation of its white color identity and thus lacks the flexibility of colorless artifacts that fit into any deck but as long as your commander doesn't hate Plains, you can't go wrong with this studious Sentinel
Historic spells can only trigger a card that cares about historic spells once regardless of how many types it has that make it historic
This deck also runs a full playset of Glorybringer and a couple of copies of Demanding Dragon
For example, Arid Mesa allows you to search for any Mountain or Plains card, not just a basic Mountain or basic Plains
Similarly, Mishra's Workshop couldn't get you many good artifacts early on, but as their quality went up, so did the potential for play of this particular land
Introduced in the first Commander precons back in 2011, its been a mainstay in the format since its release