Saheeli, the Gifted [OC18-44]

+1: Create a 1/1 colorless Servo artifact creature token. +1: The next spell you cast this turn costs {1} 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.