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 - $3.70
Lightly Played - $2.90
Moderately Played - $2.60
Heavily Played - $2.20
Damaged - $1.80
Near Mint Spanish - $3.70
Lightly Played Spanish - $2.90
Moderately Played Spanish - $2.60
Heavily Played Spanish - $2.20
Damaged Spanish - $1.80