First of all, this is what spirit mirror does:
Spirit mirror  2WW Tempest Rare
During your upkeep, if there are no reflection tokens you may put a 2/2 token that counts as a reflection into play under your control.
0: Destroy Target Reflection.
Not that good of a card? try adding these cards in to make it better:
Donate 2U Urza's Destiny Rare
Target opponent gains control of target permanent you control.
Conspiracy 3BB Mercadian Masques Rare
Choose a creature type. All creatures in your library, hand and graveyard and in play are creatures of the chosen type.
It's simple. You name reflections when you play conspiracy and then you donate it to the opponent. Then you have a free plague wind to use as many times as you want!

- Marilyn Poppins