Legendary Planeswalker — Saheeli
+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.
Any enters-the-battlefield abilities of a copied artifact will trigger when the token enters the battlefield. Any "as [this artifact] enters the battlefield" or "[this artifact] enters the battlefield with" abilities of the artifact will also work.
If a copied artifact is a token, the token that's created copies the original characteristics of that token as stated by the effect that created the token.
If a copied artifact has
in its mana cost, X is considered to be 0.
If a copied artifact is copying something else (for example, if the copied artifact is a Sculpting Steel), then the token enters the battlefield as whatever that artifact copied.
Saheeli's second ability reduces only generic mana in the cost of the next spell you cast.
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions (such as that of Saheeli's second ability). The mana value of the spell remains unchanged, no matter what the total cost to cast it was.
While resolving Saheeli's third ability, each token copies exactly what was printed on the original artifact and nothing else (unless that artifact is copying something else or is a token; see below). It doesn't copy whether that artifact is tapped or untapped, whether it has any counters on it or Auras attached to it, or any non-copy effects that have changed its types, color, or so on.