Spirit Mirror

At the beginning of your upkeep, if there are no Reflection tokens on the battlefield, create a 2/2 white Reflection creature token.
{0}: Destroy target Reflection.

Tempest Remastered

At the beginning of your upkeep, if there are no Reflection tokens on the battlefield, put a 2/2 white Reflection creature token onto the battlefield.
{0}: Destroy target Reflection.

Vintage Masters

Tempest

During your upkeep, if there are no Reflection tokens in play, put a Reflection token into play. Treat this token as a 2/2 white creature.
o0: Destroy target Reflection.

It checks if there are any Reflection tokens on the battlefield at the beginning of upkeep, and if there are it will not trigger at all. It will check again on resolution and will do nothing if a Reflection is on the battlefield at that time.