Leonin Relic-Warder
Mirrodin Besieged — uncommon
Creature — Cat Cleric
Leonin Relic-Warder rulings:
2011-06-01: If Leonin Relic-Warder leaves the battlefield before its first ability has resolved, its second ability will trigger and when it resolves, do nothing. Then its first ability will resolve and exile the targeted artifact or enchantment with no way to return it to the battlefield.