At the beginning of your upkeep, if there are no Reflection tokens on the battlefield, create a 2/2 white Reflection creature token. : Destroy target Reflection.
Spirit Mirror
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Enchantment
At the beginning of your upkeep, if there are no Reflection tokens on the battlefield, create a 2/2 white Reflection creature token. : Destroy target Reflection.
原文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.