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Jenova, Ancient Calamity (FIN #346) Jenova, Ancient Calamity | Illustration by Karo Arai Karo Arai paints Jenova, Ancient Calamity floating in a liquid tank

I used all of my mana to summon the Walking Ballista with 12 counters and its ability meant that I could then get rid of those counters to deal 1 damage to any target

She provides an enormous amount of card advantage that can win the game by itself, and its fair to call her a bomb

Think of it as Grab Your Sword, but your opponent controls when it activates, and since it only activates during your opponents turn, well usually avoid attacking Bagheera Guardian Jaguar, exert him and leave him for the opponent to find answers