Spark Rupture is a rare Enchantment card from March of the Machine: The Aftermath (MAT), collector number 55. Current market price: $0.35 (foil $0.43), TCGplayer market prices via Scryfall.
When this enchantment enters, draw a card. Each planeswalker with one or more loyalty counters on it loses all abilities and is a creature with power and toughness each equal to the number of loyalty counters on it.