Exquisite Invention

Exquisite Invention is a 100-card Commander precon from Commander 2018, released August 10, 2018. It is led by Saheeli, the Gifted, an Izzet commander.

Saheeli, the Gifted

[+1]: Create a 1/1 colorless Servo artifact creature token.
[+1]: The next spell you cast this turn has affinity for artifacts. (It costs less to cast for each artifact you control as you cast it.)
[−7]: For each artifact you control, create a token that's a copy of it. Those tokens gain haste. Exile those tokens at the beginning of the next end step.
Saheeli, the Gifted can be your commander.

The list runs 38 lands and 27 creatures, and its nonland cards average 4.16 mana. At today's TCGplayer prices the whole deck's cards come to about $78.69, and the most valuable is Unwinding Clock at $20.76.