There isn't one thing that makes The Elder Scrolls V: Skyrim fun. All its components and aspects melodically work together to provide the longest lasting game of this decade. However, if there was one thing (among many) which Skyrim would only be half as fun without, then it would be the Daedric Princes, basically the good/bad/morally ambiguous gods. These are demonic/angelic bachelors who each represent a negative or positive trait or activity in the continent of Tamriel.
The princes are not necessarily your enemies though; sometimes they like to reward those who earn their respect or those who prove loyal to them. Showing their true form to you is often beneath most of them, but you can still interact with them through their prized Daedric Artifacts, most of which are the most powerful stuff in the land of Skyrim. Hence, here are all of those artifacts if you want to get rewarded for doing evil deeds. Despite being called "princes" these... beings, don't actually have genders. They only assume either male or female aspects when dealing with mere mortals.
15 AZURA'S STAR/THE BLACK STAR
From the Daedric Prince of light and dark or night and day, comes one of the most useful Daedric Artifacts ever: the Azura's Star or The Black Star depending on your quest choices for the quest of the same name. It's essentially a reusable soul gem which does not break if you use up all the stored souls within, making it invaluable for any enchanted weapon wielder.
In order to trigger the quest "The Black Star" which rewards this artifact, go to Whiterun, look for Hulda and listen to her rumors to get the quest in your journal, she's usually at The Bannered Mare-- she owns it. Afterward, you'll have to go to the Shrine of Azura and speak to the priestess Aranea Ienith.
If you want one of the best one-handed blades the game has on offer, say no more. The Dawnbreaker from the Daedric Prince of all the energies of living things, Meridia, is a must-have for the Dragonborn. It's an enchanted sword that burns your foes and makes them explode if they're undead. It has a finite number of charges but can do around 1666 before the burning effect needs to be recharged with a filled soul gem.
If you want this powerful and beautiful sword, just keep looting some random chests until you happen upon Meridia's Beacon in one of them. This will trigger the quest "The Break of Dawn," which rewards the sword. If you want to rush the quest's trigger, simply approach the Statue of Meridia in Solitude.
13 EBONY BLADE
Next up is an artifact from an evil god, Mephala; he's the Daedric Prince of lies, secrets, and plots. His choice of reward for his loyal servants is the Ebony Blade, a weathered dark two-handed katana that absorbs the life-force of its victims basically replenishing your health. Each and every kill increases the life you absorb per hit until you reach the cap of 30 life points every connecting swing. The catch is that these kills must be game characters you consider to be your friends, or essentially friendly non-player characters (NPC).
Obtaining it is rather easy, just ask Hulda again for rumors and you'll trigger the quest, "The Whispering Door" located in the basement of Dragonsreach in Whiterun. Of course, the quest doesn't stop upon obtaining the blade, you'll have to power it up by betraying friendly NPCs, thankfully, Skyrim has its fair share of noisy and annoying characters you can easily put on your hit list.
12 EBONY MAIL
Like the Ebony Blade, the Ebony Mail is a Daedric Artifact borne out of deception. It's a prized token from Boethia, the Daedric Prince of deceit, conspiracy, and murder plots. As such, the Ebony Mail allows its users to move silently when worn. Additionally, opponents will also take poison damage per second if they get to close to the wearer. It gives off a cool black smoke effect too if you fancy the edgy assassin look.
In order to trigger the quest for it, "Boethia's Calling," you must read the book Boethia's Proving which doesn't have a set location. Instead, you'll have to be bookish and open every book and library you see to increase your chances of finding that book-- they're all scattered randomly across Skyrim. It pays to read, anyway.
11 MACE OF MOLAG BAL
The Mace of Molag Bal, as you can guess, belongs to the Daedric Prince Molag Bal whose domain is domination and enslavement. In that regard, his mace is pretty evil and captures the souls of any opponent you kill, storing them in any soul gem you have. Moreover, the mace does considerable amounts of damage to your opponent's stamina and magicka in addition to health damage. Plus, it looks like Sauron's mace, so there.
You'll want to trigger the quest "The House of Horrors." You'll be able to obtain the questline once you go to the Abandoned House in Markarth, you'll know which is which once you find a hooded robed man standing at its door who looks like he's torn on entering the house or not.
10 MASQUE OF CLAVICUS VILE
Clavicus Vile is the Daedric Prince of deals, pacts, and bargain-- a Wall Street type in all respects. Anyway, his mask or masque reflects his personality and domain. If you wear it, merchants all over Skyrim will give you a 20 percent discount. You'll also get +10 to Speechcraft and an increased rate of magicka regeneration.
If you want that discount, just trigger the quest "A Daedra's Best Friend" by talking to the blacksmith Lod in Falkreath about his missing dog. Spoiler alert: that dog talks and is a minion of Clavicus Vile, be hesitant on calling him a good boy.
9 MEHRUNES' RAZOR
This one's for assassins who love to sneak around and plunge daggers into random NPCs jugulars. Mehrunes' Razor is a magical dagger belongs to Mehrunes Dagon, the Daedric Prince of destruction, violence, and ambition. Despite being just a dagger, make no mistake about Mehrunes' Razor, it has a near two percent chance to instantly kill anyone it strikes, making it perfect for assassinations or even fights.
This forceful weapon can be obtained as a reward from the quest "Pieces of the Past." You can trigger the quest by visiting the Museum of the Mythic Dawn in Dawnstar and talking to the owner Silius Vesuius about obtaining several pieces of the artifact.
8 OGHMA INFINIUM
If knowledge is what you seek, then the Daedric Prince Hermaeus Mora might be more suited for your endeavors. His dominion is knowledge and memory. Thus, the Daedric Artifact connected to him is the Oghma Infinium-- a mere book. However, it grants five points to several of your skills depending on the path you choose (Might, Shadow, or Magic). After choosing, the book disappears from your inventory.
Simply trigger the quest "Discerning the Transmundane" and you'll be rewarded with the Oghma Infinium after completion. The quest begins by reading a book named "Ruminations on the Elder Scrolls" which is given by the orc librarian Urag gro-Shub in the Arcaneum inside the College of Winterhold. If you don't want to deal with the grumpy orc, then look for the book in Septimus Signus's Outpost in a cave to the north-east region of Skyrim.
7 RING OF NAMIRA
Namira is the Daedric Prince of all things repulsive and we don't know why he chose that path in life. For that matter, the Ring of Namira gives you a disgusting yet useful skill. Apart from increasing your stamina by 50 points, you can now feast on corpses to regenerate your health and even increase it as long as you're wearing the ring.
If you don't mind that distasteful buffet, the ring can be obtained as a reward from the quest "The Taste of Death." You can begin that quest by talking to Kleppr at the Silver-Blood Inn in Markarth about any available jobs. He will then direct you to Brother Verulus at the Hall of the Dead in the same city.
6 SANGUINE ROSE
Sanguine is the Daedric Prince of hedonism, debauchery, and dark indulgence. He's freaky, alright. In contrast, his Daedric Artifact seems rather tame. The Sanguine Rose is just a staff that lets you summon a Dremora minion which stays 60 seconds to fight for you. That's about it, the staff also has limited charges.
Still want it? Then just trigger the quest "A Night to Remember" by speaking to Sam Guevenne; you'll find him all over Skyrim in taverns. Just look for him in each and every tavern of a town or city you're currently in.
5 SAVIOR'S HIDE/RING OF HIRCINE
Hircine is the Daedric Prince of the hunting and wild things. He will offer not one, but two rewards should you choose to get involved with him-- you'll only get to pick one, though. The first one is the Savior's Hide, a light chest armor with great Poison resistance and considerable Magic resistance. The second one's Ring of Hircine, a ring which grants unlimited werewolf transformations-- only if you're a werewolf.
Both items can be obtained as a reward from the quest "Ill Met by Moonlight" which can be obtained by speaking to Mathies at the graveyards in Falkreath.
4 SKULL OF CORRUPTION
The Skull of Corruption belongs to Vaermina, the Daedric Prince of dreams, nightmares, and dark omens. It's a staff that does high damage and can even go higher if you harvest the dreams of sleeping people, meaning you'll have to be a creep to power it up.
Anyway, to obtain the staff as a reward, you'll first have to become a thane in Dawnstar. This can be done by helping out the Jarl of Dawnstar; just do any quest he has until he declares you thane. Once you're thane, you can trigger the quest "Waking Nightmare" by talking to the Jarl of Dawnstar or Erandur in the Nightcaller Temple in Dawnstar. Alternatively, you can also look for letter on the floor of Aerin's House in Riften which pleads a mercenary to help people with nightmares.
The Spellbreaker is a shield that protects against magic. If you use it against magic attacks, Spellbreaker will create a ward that will protect you against spells for 50 points. The artifact belongs to Peryite, the Daedric Prince of pestilence who also oddly craves order in his domain.
To obtain the shield as a reward, you'll want to trigger and complete the quest "The Only Cure." You'll have to be level 10 or above in order to trigger a random encounter with the Afflicted whereupon you'll be presented with a quest after slaying one. Alternatively, you can also just visit Kesh at the Shrine of Peryite in the Reach, far in the northeast of Markarth but you'll have to be level 12 first for this.
The Volendrung is one of the most baddass warhammers in Skyrim and it's ugly and large. It's perfect for brutes with no regard for subtleties. The artifact belongs to the Daedric Prince Malacath, patron saint of the orcs and also the god of the spurned and the ostracized. Apart from doing obscene damage, the Volendrung absorbs 50 points of stamina with every strike and transfers it to you.
It's one of the most robust weapons in Skyrim, so naturally, you'd want it. Obtain it as a reward during the quest "The Cursed Tribe" triggered by trekking to the orc stronghold of Largashbur near the Jerall Mountains south of The Rift region. You'll encounter some orcs fighting a giant and you must help them to save Ugor if you want access to their stronghold. If Ugor dies, however, you can still sneak through their stronghold by traversing the mountains to the far left side of the entrance. Once inside, talk to Atub, steal any equipment of Ugor's on the ground, and pay the fine once accused of stealing. You should have access to the stronghold as that point. It's Atub you'll want to talk to for the quest.
Finally, we have the most fun Daedric Artifact of all, the staff, Wabbajack. It belongs to the most interesting Daedric Prince, Sheogorath whose sphere is madness and whose motives are unknowable. Hence, the Wabbajack has no definite effect upon use. Its results are unpredictable, making it a great prank weapon. Effects range from disintegration, empowerment, or transformation of the target.
In order to obtain this ambivalent weapon of chaos as a reward, complete the quest "The Mind of Madness." To trigger it, just walk through the streets of Solitude and look for a slightly crazy old man named Dervenin. It's an insane quest so just go along with the madness and you'll be rewarded with Sheogorath's appearance and the staff itself. That ought to complete your Daedric Artifact collection. Have fun!