Unyielding Marauder

Whenever Unyielding Marauder is targeted by a spell you don't control, choose one--
- Put a +1/+1 counter on Unyielding Marauder.
- Counter that spell if it has converted mana cost X or less, where X is the number of +1/+1 counters on Unyielding Marauder.
"No matter how many ships you have, no matter how many cannons you fire, we'll keep on coming."