Protection from blue (This creature can't be blocked, targeted, dealt damage, or enchanted by anything blue.) Whenever Goblin Piledriver attacks, it gets +2/+0 until end of turn for each other attacking Goblin.
Throw enough goblins at any problem and it should go away. At the very least, there'll be fewer goblins.
Near Mint - $2.00
Lightly Played - $1.60
Moderately Played - $1.40
Heavily Played - $1.20
Damaged - $1.00
Near Mint Spanish - $2.00
Lightly Played Spanish - $1.60
Moderately Played Spanish - $1.40
Heavily Played Spanish - $1.20
Damaged Spanish - $1.00