AetherSpark

1 Tuner und 1 non-Tuner "Spark" Monster you control cannot be destroyed by battle. Once per turn (Quickeffect): Put 1 "Spark" counter on this card; Negate the Effects of a card on the field. This card loses 300 ATK and DEF for each "Spark" Counter on it. If this card has 500 or less ATK or DEF: Destroy this card and if you do put the "Spark" Counters on it on any cards on the field.