Gangplank, Saltwater Scourge

Counter the first spell that targets Gangplank, Saltwater Scourge each turn
Whenever a pirate enters the battlefield you may
pay {1}{r} to create a 0/3 Powder Keg creature
token with "When this creature dies, it deals X
damage to its controller where X is the number
of pirates on the battlefield." under the control
of each opponent.
Whenever a powder keg is destroyed, destroy all
powder kegs.