Necrotic Headhunter

Zombie Recruiting: {x}{b} (If you control three
or more Zombies, you may cast this spell for its
Zombie Recruiting cost).
When Necrotic Headhunter enters the
battlefield, if you pay the Recruiting cost,
search your library for a Zombie creature
card with mana value X or less, and put it
into a battlefield, then shuffle.

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