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Rulings (1)
Jul 15, 2006
If Lightning Serpent enters without X being paid because an effect puts it onto the battlefield or an effect lets you cast it without paying its mana cost, then X is 0.
Reprints
Jul 15, 2006
If Lightning Serpent enters without X being paid because an effect puts it onto the battlefield or an effect lets you cast it without paying its mana cost, then X is 0.