Goblin Piledriver is a rare Creature — Goblin Warrior card from Secret Lair Drop (SLD), collector number 21. Current market price: $6.84, TCGplayer market prices via Scryfall.
Protection from blue (This creature can't be blocked, targeted, dealt damage, or enchanted by anything blue.) Whenever this creature attacks, it gets +2/+0 until end of turn for each other attacking Goblin.