Eldritch Blast

Eldritch Blast (Sp): The first ability a warlock learns is eldritch blast. A warlock attacks his foes with eldritch power, using baleful magical energy to deal damage and sometimes impart other debilitating effects.
An eldritch blast is a ray with a range of 60 feet. It is a ranged touch attack that affects a single target, allowing no saving throw. An eldritch blast deals 1d6 points of damage at 1st level and increases in power as the warlock rises in level. An eldritch blast is the equivalent of a spell whose level is equal to one-half the warlock’s class level (round down), with a minimum spell level of 1st and a maximum of 9th when a warlock reaches 18th level or higher.
An eldritch blast is subject to spell resistance, although the Spell Penetration feat and other effects that improve caster level checks to overcome spell resistance also apply to eldritch blast. An eldritch blast deals half damage to objects. Metamagic feats cannot improve a warlock’s eldritch blast (because it is a spell-like ability, not a spell). However, the feat Ability Focus (eldritch blast) increases the DC for all saving throws (if any) associated with a warlock’s eldritch blast by 2.

Invocations which modify Eldritch Blast

ELDRITCH ESSENCE INVOCATIONS

Some of a warlock’s invocations, such as frightful blast, modify the damage or other effects of the warlock’s eldritch blast. These are called eldritch essence invocations. Unless noted otherwise, eldritch blasts modifi ed by eldritch essence invocations deal damage normally in addition to imparting the effects described in the invocation description.
A warlock can apply only one eldritch essence invocation to a single eldritch blast, choosing from any of the eldritch essence invocations that he knows. When a warlock applies an eldritch essence invocation to his eldritch blast, the spell level equivalent of the modified blast is equal to the spelllevel of the eldritch blast or of the eldritch essence invocation, whichever is higher. If a warlock targets a creature with an eldritch essence blast that has immunity to the invocation’s effect, it still takes the damage from the blast normally (provided it isn’t also immune to the eldritch blast).
A warlock can apply an eldritch essence invocation and a blast shape invocation (see below) to the same blast. When a warlock uses both kinds of invocations to alter an eldritch blast, the spell level equivalent is equal to the spell level of the eldritch blast, the level of the eldritch essence invocation, or the level of the blast shape invocation, whichever is higher.
Example: Morthos, a 1st-level warlock, decides to make his eldritch blast attack into a frightful blast. Morthos’s eldritch blast is the equivalent of a 1st-level spell, while frightful blast is an effect equivalent to a 2nd-level spell. His frightful blast is thus the equivalent of a 2nd-level spell.

Least Eldritch Essence Invocations

Frightful Blast: Target must make Will save or become shaken.
Hammer Blast: Eldritch blast deals normal damage to objects.
Sickening Blast: Target must make Fortitude save or become sickened.

Lesser Eldritch Essence Invocations

Baneful Blast: Eldritch blast deals extra damage against specified creature type.
Beshadowed Blast: Target must make Fortitude save or become blind for 1 round.
Brimstone Blast: Blast deals fire damage and target must make Reflex save or catch fire.
Hellrime Blast: Blast deals cold damage and target must make Fortitude save or take –2 penalty to Dexterity.

Greater Eldritch Essence Invocations

Bewitching Blast: Target must make Will save or be confused for 1 round.
Hindering Blast: Target of your eldritch blast must succeed on a Will save or be slowed for 1 round.
Noxious Blast: Target must make Fortitude save or be nauseated.
Repelling Blast: Target must make Refl ex save or be knocked back.
Vitriolic Blast: Blast ignores spell resistance and deals acid damage for several rounds.

Dark Eldritch Essence Invocation

Utterdark Blast: Target must make Fortitude save or gain two negative levels.
Binding Blast: Target of your eldritch blast must make Will save or be stunned for 1 round.

BLAST SHAPE INVOCATIONS

Some of a warlock’s invocations, such as eldritch spear, modify the range, target(s), or area of a warlock’s eldritch blast. These are called blast shape invocations. Unless noted otherwise, eldritch blasts subject to blast shape invocations deal damage normally in addition to imparting the effects described in the invocation description. A warlock can apply only one blast shape at a time to an eldritch blast, and he can choose from any of the blast shape invocations that he knows. A warlock need not apply a blast shape invocation to his eldritch blast.
When a warlock applies a blast shape invocation to his eldritch blast, the spell-level equivalent is equal to the spell level of the eldritch blast or of the blast shape invocation, whichever is higher.
A warlock can apply a blast shape invocation and an eldritch essence invocation (see Eldritch Essence Invocations above) to the same blast. When a warlock uses an eldritch essence and a blast shape to alter an eldritch blast, the spell-level equivalent is equal to the spell level of the eldritch blast, the eldritch essence invocation, or the blast shape invocation, whichever is higher.
Example: Morthos decides to make his eldritch blast attack a hellrime eldritch spear. As a 6th-level warlock, Morthos’s eldritch blast is the equivalent of a 3rd-level spell. Eldritch spear is the equivalent of a 2nd-level spell, while hellrime blast is the equivalent of a 4th-level spell. His hellrime eldritch spear is therefore the equivalent of a 4th-level spell.

Least Blast Shape Invocations

Eldritch Spear Blast range increases to 250 feet.
Hideous Blow Melee attack channels eldritch blast.

Lesser Blast Shape Invocation

Eldritch Chain Blast jumps from initial target to secondary targets.

Greater Blast Shape Invocation

Eldritch Cone Blast takes the shape of a cone.

Dark Blast Shape Invocation

Eldritch Doom Blast affects all enemies within 20 feet.

Feats which Affect Eldritch Blast

Feat Prerequisites Effect Source
Eldritch Dragonbane Ability to invoke an eldritch blast, any true or aberrant dragonmark Your eldritch blast deals extra damage to dragons and creatures with the dragonblood subtype Dragonmarked
Eldritch Mark Ability to invoke an eldritch blast, any true or aberrant dragonmark Spend 1 action point to render a target flat-footed with your eldritch blast Dragonmarked
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