Mortality Spear

This spell costs {2} less to cast if you gained life this turn.
Destroy target nonland permanent.

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To determine the total cost of a spell, start with the mana cost or alternative cost you’re paying, add any cost increases, then apply any cost reductions (such as that of Mortality Spear). Mortality Spear’s mana value is always 4, no matter what the total cost to cast it was.