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Given that it costs 3 Grass Energy to use, thats 90 HP damage at a minimum

You can obtain the Mega Lucario ex (4-Diamonds rarity) card by opening Pulsing Aura from Pulsing Aura set

Once a permanent you control leaves the battlefield, Aether Revolt's revolt ability will apply to noncombat damage dealt by sources you control until the turn ends or Aether Revolt leaves the battlefield, whichever happens first

Titanic Ultimatum Titanic Ultimatum is a finisher

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You can also run lands like Cabal Coffers to speed things up even more, ideally giving you extra mana for the final piece of the puzzle