Saheeli's Artistry

If you choose both modes, you may target a single artifact creature twice and get two copies of that artifact creature.

If the copied permanent is copying something else (for example, if the copied permanent is an Altered Ego), then the token enters the battlefield as whatever that permanent copied.

If you choose both modes, the tokens enter one at a time. Thus, if the token created by the second mode has an ability that triggers “whenever an artifact enters the battlefield,” the token created by the first mode will already be on the battlefield and won't cause that ability to trigger.

Any enters-the-battlefield abilities of the copied permanent will trigger when the token enters the battlefield. Any “as [this permanent] enters the battlefield” or “[this permanent] enters the battlefield with” abilities of the chosen permanent will also work.

Any abilities that trigger during the resolution of Saheeli's Artistry will wait to be put onto the stack until Saheeli's Artistry finishes resolving. An ability that triggers on the first token entering the battlefield may target the second token and vice versa.