The part that has been taking me extra long with the adventure was that stupid custom axe I was making. I think I finally got it done though. I changed it to a heavy pick and used the intelligent item rules and the cursed item rules. Until you meet all the weapon's requirements, it functions only as a +1 adamantine heavy pick with a minor drawback of spraying fake blood all over whenever it hits stone. Hopefully you'll appriciate the effort after that Nerdery about making +1 weapons seem cool.
Possessions: Helljack has an intelligent, unique pickaxe called Stonebleeder (worth 5058 gp, but is only fully functional if the wielder meets all the weapon's requirements), detailed below. If you have Weapons Of Legacy, you could make Stonebleeder into a legacy weapon with a little work. If you do this, the drawback should be used as the weapon's Omen, and its intelligence and associated powers part of its legacy (and thus only granted to Helljack and others who spend the time and money to unlock these powers). Otherwise, use the rules below.
Stonebleeder: +1 adamantine heavy pick, +2 circumstance bonus on Profession (miner) checks (due to being a masterwork tool, see page 131 of the PHB); AL LN; Int 13, Wis 13, Cha 10; Empathy, 60 ft. vision and hearing; Ego score 6.
Lesser Power: Item has 10 ranks in Profession (mining) (total modifier +13), Golembane 3/day (each use lets Stonebleeder deal critical hits and sneak attacks to constructs and objects for one round).
Requirements: Stonebleeder only functions as a +1 adamantine heavy pick, with its +2 circumstance bonus to Profession (miner) skill checks due to being a masterwork tool (pg 131 PHB), unless certain requirements are first met. A PC can learn of these requirements (along with an idea of the new powers it will gain) with a bardic knowledge or Knowledge (history) check DC 20, or with an identify spell (or equivalent). First, a new wielder must break at least 8775 gp worth of precious stones and metals using the pick, along with permanently investing 702 xp. The weapon's threat range doubles (making it a +1 keen adamantine heavy pick) in the hands of a wielder with at least 5 ranks in Profession (miner).
Drawback: Sprays Illusory blood when it strikes objects and creatures that are made of or that appear like stone (this can grant a bonus to Intimidate checks, as mentioned above).
Personality: This pickaxe used to belong to a great dwarven miner and fighter. The dwarf had many dealings with the Elemental Plane of Earth and its natives, and it is rumored it was these dealings that brought such power to his pickaxe. Happy whether mining or sundering an enemy's shield, Stonebleeder loves clawing into the earth and tearing through items made from what the earth has yielded. Stonebleeder can use its Empathy to guide the hand of its wielder while mining, which functions similiar to the Aid Another action (granting the wielder a +2 to his Profession check; this bonus stacks with the +2 bonus for being a masterwork tool). Alternatively, the wielder can make a Profession (miner) check for himself and another for Stonebleeder, then take the better result.