Diamond Pick-Axe is a uncommon Artifact — Equipment card from The List (PLST), collector number LCI-143.
Indestructible (Effects that say "destroy" don't destroy this Equipment.) Equipped creature gets +1/+1 and has "Whenever this creature attacks, create a Treasure token." (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.") Equip {2}