Mad Mauler

This card's name becomes "Plaguespreader Zombie" while on the field or in the GY. If this card is in your GY: You can target 1 Level 6 or higher monster you control; decrease its Level by 2, and if you do, Special Summon this card, but you cannot Special Summon monsters while it is face-up in the Monster Zone, except Zombie monsters. You can only use this effect of "Mad Mauler" once per turn.