Warlocks are born, not made. Their ancestors traded portions of their soul for magical power, and warlocks inherit this power. Unlike sorcerers or wizards, rather than harnessing magic through the guidelines of a spell, they manipulate the supernatural energy infusing them with will alone. The demand to further the goals of the originators of the pact, or to fight them, drives many to adventuring.

A warlock serves much the same role in an adventuring party as a sorcerer or wizard would. He is much more limited in his abilities compared to the spell selection of spellcasters, and he must rely on his eldritch blast in place of the spell power of an arcane caster. Like a bard, he often fits best in a party that already has another spellcaster or two, since his unique abilities provide him with little magic to use for his companions' benefit.

Hit Die: d6
Alignment: Chaotic or Evil only.
Proficiencies: Warlocks are proficient with simple weapons and light armor.
Skill Points: 2 + Int Modifier(x4 at 1st level)
Primary Saving Throw(s): will.
Base Attack Bonus: +3/4 levels.
Class Skills: The warlock's class skills are Bluff, Concentration, Intimidate, Lore, Spellcraft and Use Magic Device.

Invocations: These are spell-like abilities. Any of them that are known can be used at will, but otherwise act like spells, such as in regards to casting in combat, or spell resistance. Casting level is the warlock's class level, and those that grant saves have a DC of 10 + the equivalent spell level + the warlock's Cha modifier.

They come in 4 grades: least(2nd), lesser(4th), greater(6th), and dark(8th). Warlocks start with knowledge of a single least invocation, and gain access to more as below. At levels 6, 11, and 16 they also unlock the next level of invocation. At any warlock level, they can replace an invocations they already knows with another invocation of any grade they qualifies for.

Invocations are also subject to arcane spell failure, but warlocks ignore spell failure in light armor.

Eldritch Blast: The first ability a warlock learns is the eldritch blast; a 60' ray of magical energy. It has no saving throw, but is affected by spell resistance and requires a touch attack. Certain types of invocations can modify it, and it increases in damage as level increases.

Damage Reduction: Fortified by the supernatural power flowing through his body, a warlock gains damage reduction 1/+1 at level 3. This reduction increases by 1 point every 4 levels.

Deceive Item: A warlock can use his mastery of the supernatural forces infusing his soul to make up for lack of knowledge. From 4th level on, a warlock can take 10 on all Use Magic Device checks, even in combat.

Fiendish Resilience: Beginning at 8th level, a warlock knows the trick of fiendish resilience. For 2 minutes each day, they gain fast healing, with the amount increasing at levels 13 and 18.

Energy Resistance: Beginning at 10th level a warlock chooses 2 elemental energies and gains 5% immunity to them. This immunity increases to 10% at level 20.

Emulate Arcane Item: A warlock of 12th level or higher can emulate arcane classes for the purpose of item class limitations. This ability allows him to use any item restricted to bard, sorcerer or wizard freely without need for use magic device skill.

Epic warlocks are supernatural power incarnate, retaining only the barest shred of their previous existence. Their damage reduction increases by 1 at level 23 and every 4 levels thereafter. They learn no new invocations normally, but their invoker level continues to increase. Their Eldritch Blast damage increases by 1d6 at level 22, and increases every 2 levels thereafter. They also gain a bonus feat every 3 levels.

Feats:
Extra epic invocation 1-10
fiendish Resilince 1-10
Eldricht Sculptor
Lord of all essence