Soul of Mirrodin is a rare Artifact Creature — Spirit card from Unknown Event (UNK), collector number RA06b.
Trample {5}: Search your library for an artifact card with mana value 5 or less, put it onto the battlefield tapped, then shuffle. {5}, Exile Soul of Mirrodin from your graveyard: Search your library for an artifact card with mana value 5 or less, put it onto the battlefield tapped, then shuffle.