Malignant Growth

Cumulative upkeep (At the beginning of your upkeep, put an agecounteron this permanent, thensacrificeit unless you pay its upkeep cost for each agecounteron it.) At the beginning of your upkeep, put a growthcounteron this enchantment. At the beginning of each opponent's draw step, that player draws an additional card for each growthcounteron this enchantment, then this enchantment deals damage to the player equal to the number of cards they drew this way.