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 - $3.10
Lightly Played - $2.90
Moderately Played - $2.80
Heavily Played - $2.50
Damaged - $2.00
NM-Mint Non English - $3.10
Lightly Played Non English - $2.90
Moderately Played Non English - $2.80
Heavily Played Non English - $2.50
Damaged Non English - $2.00