Medusa, Gorgon Queen

Petrify (At the beginning of each players upkeep, you may sacrifice {x} green Medusa's Offspring Creature Tokens, then Target Player taps {x} untapped permanents he or she controls.)
{x}{x}{g}, create {x} (2/2) green Medusa's Offspring Creature Tokens with "When this creature dies, create two (1/1) green Medusa's Offspring Creature Tokens."

"Many desired her, but few dared to look at her"
—Someone who didn't look at her