Wandering Mage
Masters Edition III — rare
Creature — Human Cleric Wizard
Wandering Mage rulings:
2009-10-01: The second ability checks that the targeted creature is a Cleric or Wizard only at the time the ability is activated and at the time it resolves. It doesn’t check at the time the damage is actually prevented.
2009-10-01: If you activate Wandering Mage’s third ability, you put the -1/-1 counter on a creature you control as a cost. That means it happens when you activate the ability, not when it resolves. If paying the cost causes the only creature you control to have 0 toughness, it’s put into the graveyard before you can pay the cost again.