These are the first spoilers from the set, revealed alongside a ton of other cards during MTG Minneapolis
Legal in Pioneer, Modern, Legacy, Vintage, Commander, Brawl, Historic Rulings (11) The value of X is determined as Electrostatic Pummeler's last ability resolves
X can't be greater than the amount of life you gained this turn
Series This product is sold out Mewtwo Strikes Back Old Back Special Jumbo Card 1 3,319 Mewtwo Strikes Back Old Back Special Jumbo Card 1 Seller 1579121 Goods Trading card Brand Pokemon Cards Series number of cards 1 card Condition Used Shipping Days 34 Days Shipping fees 4,000JPY Shipping fee may vary depending on the destination country
Your ideal use case is to cast Hour of Reckoning during your first main phase, then you attack into disadvantageous board states with whichever creatures you didnt tap to cast it