Card Rulings:Defender, the Magical Knight

OCG Rulings

 * When applying the effect of "Mage Knight Defender", you do not choose how many Spell Counters to remove - you must remove a number of Spell Counters equal to the number of Spellcaster-Type monsters which will be destroyed.
 * Example: You control "Mage Knight Defender" and two other face-up Spellcaster-Type monsters. When your opponent activates "Lightning Vortex", if you want to use the effect of "Mage Knight Defender", then you must remove three Spell Counters.  (You cannot remove two Spell Counters to prevent the destruction of only two Spellcaster-Type monsters.)  If "Mage Knight Defender" does not have three Spell Counters, then you cannot apply the effect.