Creature — Human Cleric Wizard 0/3, WUB (3)
Rare
{W}, Pay 1 life: Prevent the next 2 damage that would be dealt to target creature this turn.
{U}: Prevent the next 1 damage that would be dealt to target Cleric or Wizard creature this turn.
{B}, Put a -1/-1 counter on a creature you control: Prevent the next 2 damage that would be dealt to target player this turn.
Illus. Pete Venters

10/1/2009: 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.
10/1/2009: 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.
Official Reprint Policy (This card is on the reserved list)
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander