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.
NM-Mint - $1.40
Lightly Played - $1.40
Moderately Played - $1.30
Heavily Played - $1.10
Damaged - $0.90
NM-Mint Non English - $1.40
Lightly Played Non English - $1.40
Moderately Played Non English - $1.30
Heavily Played Non English - $1.10
Damaged Non English - $0.90