Spirit Mirror

Enchantment    (CMC:4)

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. : Destroy target Reflection.

35 TPR • END. Alexander Gregory

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Oracle Text (click to copy):

10/4/2004
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.