Spear of Divinity.
This weapon was found in a divine passage inside a holy church, being guarded and used by the Divine Protector, Undead Oscar. It gives off a strange aura, which appears to glow lightly blue. A quiet humming noise emits from it's magically infused tip. The weapon was designed to suit someone of true holy faith, and only the truly divine could wield such a weapon, and it grows stronger with increased faith. The spear punishes it's user if it is being used excessively against people of non-evil standing, and results in a degrading of physical strength, and moral degradation in it's user.
The spear is found in a hidden passage inside a chapel dedicated to Gwyn. You must have at least 35 faith to be admitted entry, and undergo trials and be able to persuade the leader of the chapel that you are worthy of going down to the tomb of the Divine Protector. To start this series of trials, you must talk to the leader of the chapel, which is found far away from civilisation. When speaking with him, he asks you this; "I see another faithful traveller has found us. Welcome into our chapel, friend. My name is Father Peter, and I feel you could become one of us, in a special way. Only, you must prove your faith to us first. What say you?"
If you respond "YES" he will say "Good to hear, friend. First, you must mete out punishment to the unholy gods. Find and seek out Balthezar in Nzarchaft, and we can talk further on the matter. Only, be wary, you will need immense physical and personal strength to persevere to the end of this task." If you say "NO" he will say "Well, that is a saddening thing to hear. It appears we shall have to look for another traveller to become our new Diving Protector.."
The task itself is extremely punishing, long and difficult, as well as demoralizing at times. The dungeon itself is a maze as soon as you walk in, full of identical looking, long, narrow passages, with no idea what could be around the corner of any of these passageways. Some of them have notably good loot, such as a Greatshield of Strength, which increases strength by 2 points as long as you wield it, and a Hood of Stealth, which allows for better backstab damage on enemies unaware of your presence. There are several traps, including fire from walls, spike pits below fragile flooring, and the only way to get to Balthazar is to go through the entire maze, until you find a key to a door, which is hidden behind an illusory wall, which is opened via baiting a bolt trap into hitting the illusory wall.
When you reach Balthazar himself, you are given different choices. When you talk with him, he shall say "I see those idiotic priests have sent another self-righteous traveller to try and be rid of me. Do you really think they are in the right here? I can offer much more power and wealth than they ever could! Just come over here, and look into the sphere over there, and see your future as my right hand man."
If you choose "YES" to this, he shall say "Great, just great! Now, walk with me, we have a few things to discuss.." If you choose "NO" he shall say "Fine let them indoctrinate you with their beliefs. If you survive this encounter, you foolish soul!" He then proceeds to fight you, and a hell of a tough fight it is. You have to break his guard by the mean of parrying and doing a riposte on a jumping attack he does, which may take a bit of time to learn the parry timing to, and even then, you must still bait him into attacks so you can punish them, he can not be beaten conventionally. When the battle is over, you can either Homeward Bone to the bonfire which is near the chapel, or walk out the long way, looking for more loot along the way.
Upon talking with the leader of the chapel once again, he says to you "Welcome back brother. So, how did the ordeal go? Is Balthezar dead?" If you respond "YES" to this, he shall say "Very well done! You have proven yourself to be strong so far, but dare you attempt the second trial of faith?" (FYI: If you chose to side with Balthezar, he would have told you to say he was dead, but when chosen, the priest is suspicious of your intents, and says you have a "Strange aura" around you, and refuses to speak with you further.) If you say "YES" to doing the next trial the priest says "Great to hear, brother. Your next trial is to go to Nivenir, and find the initiate priest, Brother Marcus. He can instruct you further on what you need to do when you meet him. He should be at the entrance to the ruins." If you say "NO" he will say "I'm not sure why you went through with the first trial, only to stop here. But, you are a welcome member of our chapel from now."
Once you arrive at the entrace to Nivenir, which is near the chapel, but further south, you will find Brother Marcus there. He will approach you, with a big ewer in his hands, and say "I had received word you would arrive. Your objective is to take this ewer with you, and go to 3 points around the ruins. Inside the ruins, I think there are hints as to where they may be, but I assure you that they are not safe to reach."
Once inside, you find it is pitch black, with no light form to show the way. You must find an inscription on a wall, and run your hands over it to find the words they make, which is "Thou shalt not pass, devil of the dark." You will need this knowledge later. You find a light source a few minutes ahead, surrounded by glowing eyes, and grunting noises seem to be being made nearby. You have to run right through them, without stopping, take the Lantern, and equip it once you are out. Dying will make you drop the light source at the place where you died.
Once the light source is on, you see the ruins are collapsing, to an extent. The walls and floor are degrading, falling apart, so every step you make could be an environmental hazard. Wearing lighter armour makes it less likely that something will fall on you. At the end of the area you are in, there is a little area, with light shining down on it, and a well of holy water. This is the first point you need to go to fill up the ewer. When you fill up part of the ewer with the water, there is an inscription on the bottom of the well, which says "Thou of holy light, pass through the halls ahead."
Here is where you needed the inscription on the wall to come in. You must carve it into the door with any object you have on you. If you did it right, the wall shall open up, and reveal a long, icy corridor. The flooring is uneven here, and it is too cold to be conscious of your hands, as they are numb. You need to watch your step, and walk slowly to prevent falling through the floor to death by freezing. For the next hint as to where you need to go, you need a light source to melt off some of the ice upon the walls. When you finally burn the correct place, near the end of the corridor, there will be an inscription, saying "Thou of the evil being shall never find salvation."
Enemies are much more numerous outside of this corridor, where shadow manifestations are trying to kill you with blades of darkness, jutting out of the walls. At the end of this part, there will be a huge pit, and inside the pit, roaring fires. A voice talks to you in this room, saying "You must jump in. Jump to become one with God! JUMP! JUMP! JUMP!!!!" If you choose "NO" the voice says "I suppose you were never the one for this. Turn back, before I make you die a slow and agonizing death."
Choosing "YES" to this makes the voice say "Good. You shall find true peace in doing this. Now, JUMP!
Jumping in was the solution to the area, since it was bringing you salvation, in the form of "death". You find yourself walking on clouds, far above the ground, and there is the second well at the far corner of the cloud walkways. Draining the water into the ewer reveals another clue at the bottom, this time saying "If thou must succeed in thou quest, you must make a sacrifice to something very dear."
You must now choose a pathway; There is a sign next to the well, saying "Leap from the sky to the ground, or down the well into the caverns?" There is no "bottom" in the well, but the bottom is illusory. Jumping in makes you fall into some caverns, where you end up paralysed, and must endure a long period of excessive pain from falling rocks. The sacrifice to someone dear here is to yourself, but your endurance, vitality, and faith go down by 10 by doing this. But, the ewer is somehow full.
Jumping from the sky lets you fall onto the ground.. Straight onto Brother Marcus' head. You lose 15 faith by doing this choice, and the dear people are Marcus and yourself. You must go back to the chapel now, to tell the priests of your trial. The leader approaches you, and says "There is something.. Much more different to you. What happened? Did we lose Marcus?" If you reply "YES", Peter says "'Tis a shame. But, what needed to be done had to be done." Congratulations!" If you reply "NO", Peter will say "Then I do not see what is so wrong with you. Regardless, well done on your trial! Are you ready for the next trial?"
Replying "YES" makes Peter say "Your trial is far simpler this time. Defeat our former champion, Undead Oscar, who is in the Tomb. Only, how can I trust you? A donation always helps..." Donating 2000 souls to Peter makes him say "Thank you brother. Just hit the wall to the right of the donation pool, and you will find the passageway to Oscar. May Gywn be with you."
Replying "NO" makes him say "You came so far.. Still, you are a loyal member of this chapel, and you shall have our respect as long as you are here."
The fight with Oscar is similar to the fight with Balthezar, only, you must protect yourself against his usage of the Spear of Divinity, by retreating to the corner of the Tomb, backstabbing him, and then continue fighting. This may happen multiple times, dependant on how fast you can kill him. When Oscar dies, you can take the spear, and upon talking with Peter again, he says "My goodness! You defeated Oscar! You truly are our Divine Protector! Here, let me enchant the spear with out blessings. You have our eternal respect, holy one!"
FAR TOO LONG! TL;DR!
Just look at the top bit. I got far too in-depth with the way of obtaining it.