Infected Spartan

{10}{b}{g}: Monstrosity 10. This ability costs {1} less to activate for each creature with power
4 or greater your opponents control. (If this
creature isn't monstrous, put ten +1/+1 counters on
it and it becomes monstrous.)
When Infected Spartan becomes monstrous,
destroy all artifacts and creatures other than
Infected Spartan.
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