Saheeli, the Gifted - Commander 2018

[+1]: Create a 1/1 colorless Servo artifact creature token.

[+1]: The next spell you cast this turn 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.