Warlock

Gifted the power of Eldritch magic by a sacred source, Warlocks cast magic through their pact with an ancient Fey, a Fiend from Hell, or one of the ancient ineffable powers. Of all the spell casting classes, Warlocks may be the most unique: instead of constant expansion of spell slots, they mix "traditional" spells with cantrips and Mystic Arcanums, given them a wide variety of both spell types and effects.
Warlocks are also more capable than other spellcasters at melee fighting, and are able to withstand more damage. More. They're still pretty fragile, but more.
Warlocks--like all of the magic classes--tend to be high risk/high reward: you can turn the tide of battle with a single spell. At the same time, when your only Level 5 spell slot fails, it's pretty demoralizing. This may be less true for Warlocks than other magic classes, but it still applies.
CHA is your most important ability, followed by CON.

Otherworldy Patron

Warlocks gain their powers through different Otherworldy Patrons, but they tend to come from the worlds of the fey, fiends, or those unfathomable deities that sit outside the plane of reality. Each patron type grants 10 additional spells to the warlock spell list. See PHB 108-110, XGE 54-57 for details.

The Beholder

Your Patron is a Beholder, granting you mental powers.

Ancestor Spirit

Your Patron is a powerful Ancestor, whose spirit guides you.

The Ancient Dragon

Your Patron is an ancient dragon, helping you develop your own lair.

The Ancient Evil Dragon

Your Patron is not only an ancient dragon, but an evil one to boot.

Ancient Sage

Your Patron passes on wisdeom of the ages and the ancestors.

Angst's Will

Your Patron uses specialized crystals to grant you powers.

The Annihilator

Your Patron is a dread force of the apocalypse.

Archangel

Your Patron is an archangel.

The Archfey

Your Patron hails from the realm of the fey, granting you powers related to illusion and escape. Specific patronage is available for Cailleach, Fenrir, Finnbheara, Jörmungandr, or Úna.

The Archlich

Your Patron is an ancient undead evil.

The Artists

Your Patron is a deity dedicated to one of the arts.

The Avatar of Bloodthirst

Your Patron is an arcane force of blood magic, who demands more to be shed.

The Blasphemouse Incantator

Your have the ability to draw power form a variety of demons.

The Blight

Your Patron is a force dedicated to the renewal of nature, over the "civilized world."

The Broken Pact

Your Patron is a trickster who expects vows to be broken.

The Brood Mother

Your Patron is a deity of insects.

The Ceaseless Hunger

Your Patron is an ancient force with a ceaseless hunger for power and sacrifice.

The Celestial

Your Patron hails from the upper realms, granting you powers of healing and light.

Chaos Wielder

Your Patron is a source of Elemental Chaos.

Draconic Pact

One of a number of arrangements where your Patron is a dragon.

The Dragon

Your Patron is a ... dragon, and over time, you may become one, too.

The Dream Weaver

Your Patron is an entity that resides in your deepest dreams.

The Eldritch Champion

Your Patron has selected you to be their force on the material plane.

The Endbringer

Your Patron is a herald of the apocalypse.

The Everchanging

Your Patron is unknowable and always changing, as are you.

The Evermore

Your Patron is a deity of time.

The Fathomless

Your Patron hails from the Elemental Plane of Water, granting you powers of the deep.

The Fiend

Your Patron hails from the lower planes, granting you fiendish affinities.

The First Vampire

Your Patron is a vampire, the first.

The Genie

Your Patron hails from one of the Elemental Planes, granting you powers related to their homeland of earth, air, water, or fire.

The Genie Lord

Your Patron provides you with an elemental token, granting you powers.

The Ghost Town

Your Patron channels an abandoned community.

Giant Lord

Your Patron channels the powers of the truly large.

The Great Old One

Your Patron hails from the nameless planes, granting you powers of mental control.

The Great Wyrm

Your Patron is an ancient, ancient, ancient dragon. Very old.

The Greatwyrm

YourPatronisanancient,ancient,ancientdragon. Veryold.

The Hexblade

Your Patron hails from the Shadow lands, increasing your melee possibilities and allowing you access to a powerful array of hexes.

The Lady of the Lake

Your Patron is a creature of pure empathy from Arturian legend.

Lady of Pain

Your Patron is ... ouch.

The Land

Your Patron is the emobdiment of the natural world itself.

The Living Mist

Your Patron is an ancient mist that dwells between planes of existence.

Pact of the Merchant

Your Patron demands wealth, and promises the same.

The Mirrorwalkers

Your Patron moves between planes with ease.

The Monolith

Your Patron is the force behind the remnants of an ancient architecture.

The Mother of Sorrows

Your Patron is a deity of grief.

Nature

Your Patron is a force of the natural world. (2 variants.)

The Norns

Your Patrons are the sisters of fate.

One & The Prime

Your Patron is the original mover itself.

The One Who Dreams

Your Patron is an elder entity imbued with the power of dreams.

The Pact of the Coven

Your Patron operates in small groups of like-minded Warlocks.

The Raven Mistress

Your Patron is a goddess focused on memory, loss, and tragedy.

The Returned

Your Patron is an angel, who, having saved you from death, has tasked you with specific service in the world.

The Sea Lord

Your Patron is a ruler of the deep.

Secret Sorority

Your Patron is a hidden coven.

The Seducer

Your Patron rules over the desires of the night.

Soul Thief

Your Patron is a deity of trickery who feeds on souls.

The Sybile

Your Patron is a divine being associated with prophecy, faith, and divination.

Titan

Your Patron is one of the beings who stepped out of the original chaos.

The Trickster

Your Patron is a Trickster deity.

The True Emperor

Your Patron is a long-vanished master of psychic abilities.

The Underground Patron

Your Patron is the fire that lurks deep beneath the urth.

The Urban Legend

Your Patron is a rumor of a lurking rumor tied to specific geography.

Urbanist

Your Patron is the entirety of a city, its population, and its geography.

Vampiric Bloodline

Your Patron is an ancient vampire.

The Volcano

Your Patron is a seething cauldron of fire (2 variants).

The Warden

Your Patron is a deity tasked with preventing beings and/or their souls from leaving the underworld.

Warlord

Your Patron is a deity of war and battlefield tactics.

Witchservant

Your Patron is an ancient powerful Hag.

Available Classes

Artificer

Barbarian

Bard

Cleric

Druid

Fighter

Monk

Paladin

Ranger

Rogue

Sorcerer

Warlock

Wizard

Remember

These are meant as a summary of the class. The official rules should be consulted, either directly or through the DM with any questions or clarifications.
Scroll down for full class details.

Available Races

Dragonborn

Dwarves

Elves

Gnomes

Half-Elves

Half-Orcs

Halflings

Humans

Tiefling

Warlock

A warlock is defined by a pact with an otherworldly being. Sometimes the relationship between warlock and patron is like that of a cleric and a deity, though the beings that serve as patrons for warlocks are not gods. A warlock might lead a cult dedicated to a demon prince, an archdevil, or an utterly alien entity—beings not typically served by clerics. More often, though, the arrangement is similar to that between a master and an apprentice. The warlock learns and grows in power, at the cost of occasional services performed on the patron’s behalf.
The magic bestowed on a warlock ranges from minor but lasting alterations to the warlock’s being (such as the ability to see in darkness or to read any language) to access to powerful spells. Unlike bookish wizards, warlocks supplement their magic with some facility at hand-to-hand combat. They are comfortable in light armor and know how to use simple weapons.

hit dice: 1d8

hit points at 1st level: 8 + CON modifier

hit points at higher levels: 1d8 (or 5) + CON modifier

armor proficiencies: Light

weapon proficiencies: Simple Weapons

tools:

saving throws: WIS; CHA

skills: 2 from Arcana, Deception, History, Intimidation, Investigation, Nature, Religion.

starting equipment:
A light crossbow and 20 bolts or any simple weapon; a component's pouch or an arcane focus; a scholar's pack or a dungeoneer's pack; leather armor, any simple weapon, and 2 daggers.

spellcasting:
CHA is your spellcasting ability.
Spell Save DC = 8 + Proficiency Bonus + CHA modifier
Spell Attack Modifier = Proficiency Bonus + CHA modifier

Cantrips

At 1st Level, you know 2 cantrips from the warlock spell list. You learn additional cantrips at higher levels, as shown in the CANTRIPS column of the Warlock Table below.

Spell Slots

The Warlock Table below details how many spell slots you have available. Note that, as a Warlock, all of your spell slots are of the same level. Your lack of spell slots is made up for by your ability to learn Eldritch Invocations, which are unique to Warlocks.

Spellcasting Focus

You can use an arcane focus as a spellcasting focus.

class features:

Otherworldly Patron

At 1st Level, you strike a bargain with an otherworldly being, granting you Pact Magic. You can features from this being at 1st, 6th, 10th, and 14th Level.

Eldritch Invocations

At 2nd Level, you gain 2 Eldritch Invocations. You gain additional Eldritch Invocations according to the Warlock Table below; each time you gain additional Eldritch Invocations, you can replace 1 you already know with 1 of your choice. See PHB 110-111, XGE 56-57, TGE 70-71 for the full list of Eldritch Invocations.

Pact Boon

At 3rd Level, you gain 1 of the following 3 boons from your Otherworldly Patron: Pact of the Chain, Pact of the Blade, Pact of the Tome, or Pact of the Talisman. See PHB 107-8, TGE 70 for full details, but each Pact allows you to create a spectral object (a familiar, a weapon, a tome of spells, and an amulet, respectively).

Ability Score Improvement

At 4th, 8th, 12th, 16th, and 19th Level, you can increase 1 ability score +2 or 2 ability scores +1 (20 max).

Eldritch Versatility

At each Ability Score Improvement, you can do one of the following: replace a cantrip, replace a Pact Boon option, or, at 12th Level, replace one spell from your Mystic Arcanum.

Mystic Arcanum

At 11th Level, you can choose 1 6th Level spell from the warlock spell list which you can cast without expanding a spell slot. You gain additional Mystic Arcanums at higher levels, gaining higher level spells as well: at 13th Level, you gain a 7th Level spell; at 15th Level, an 8th Level spell; and a 9th Level spell at 17th Level. All Mystic Arcanums are regained after a long rest.

Eldritch Master

At 20th Level, you can spend 1 minute entreating your Otherworldly Patron to restore your spell slots. You may do this again after a long rest.

subclass options:
Your Otherworldly Patron determines your development as a Warlock.

LEVEL	PROFICIENCY	FEATURE	CANTRIPS	SPELLS KNOWN	TOTAL SPELL SLOTS	INVOCATIONS
1	+2	Otherworldly Patron Pact Magic	2	2	1 1st Level
2	+2	Eldritch Invocations	2	3	2 1st Level	2
3	+2	Pact Boon	2	4	2 2nd Level	2
4	+2	Ability Score Improvement with Eldritch Versatility	3	5	2 2nd Level	2
5	+3		3	6	2 3rd Level	3
6	+3	Otherworldly Patron Feature	3	7	2 3rd Level	3
7	+3		3	8	2 4th level	4
8	+3	Ability Score Improvement with Eldritch Versatility	3	9	2 4th Level	4
9	+4		3	10	2 5th Level	5
10	+4	Otherworldly Patron Feature	4	10	2 5th Level	5
11	+4	Mystic Arcanum (6th Level)	4	11	3 5th Level	5
12	+4	Ability Score Improvement with Eldritch Versatility	4	11	3 5th Level	6
13	+5	Mystic Arcanum (7th Level)	4	12	3 5th Level	6
14	+5	Otherworldy Patron Feature	4	12	3 5th Level	6
15	+5	Mystic Arcanum (8th Level)	4	13	3 5th Level	7
16	+5	Ability Score Improvement with Eldritch Versatility	4	13	3 5th Level	7
17	+6	Mystic Arcanum (9th Level)	4	14	4 5th Level	7
18	+6		4	14	4 5th Level	8
19	+6	Ability Score Improvement with Eldritch Versatility	4	15	4 5th Level	8
20	+6	Eldritch Master	4	15	4 5th Level	8