I’m glad it’s available for both the warlock and the warlock

Quote from EdisDnilb >>

I’m glad it’s available for both the warlock and the warlock

 Always good to have those guys included

Ooh, hey! You can target Objects now!

"Creature or object" Hooray!

No more of this weirdness: "I shoot eldritch blast at the crossbow trap" "Sorry, that's an object, so you can't."  "Fine, from now on I will eldritch blast every treasure chest we find and if it works that means the chest is a creature such as a mimic."

I was so scared that it was only for warlock, but then i found out that it was for warlock warlock and now all my fears are gone

I knew this would be a warlock spell, but who would have guessed that warlocks could use it as well as warlocks?!

I'm kinda wondering how agonizing blast works with this.  The wording is a bit different.  Do you add your CHA into just one of the blasts or all of them?

Quote from Sir_Gib >>

I'm kinda wondering how agonizing blast works with this.  The wording is a bit different.  Do you add your CHA into just one of the blasts or all of them?

All of them. This is true in both the 2014 rules and the 2024 rules.

Agonizing Blast (2014) says "add your Charisma modifier to the damage it deals on a hit", so every beam that hits deals the extra damage.

Agonizing Blast (2024) says "you can add your Charisma modifier to that spell's damage rolls". The use of "rolls", plural, means that it does the extra damage on every damage roll the spell causes. 

Eldritch Blast   Legacy This doesn't reflect the latest rules and lore. Learn More Basic Rules, pg. 237

Link to the legacy version of this spell

Wiserds

Quote from Scienceboy1 >>

Ah the cantrip that with a +10 CHA can deal 62 force damage

If you somehow have a Charisma score of 30, and you're level 17+, and you have Agonizing Blast for this spell, then 62 is the average damage, yes. The actual damage range would be between 44 and 80.

Though if you've managed to get your Charisma all the way up to 30, there are probably more interesting things you can do than spam Eldritch Blast.

Little known fact but Warlocks actually can do things other than cast Eldritch Blast with their action.

Are there more interesting things to do than spam Eldritch blast? Yes. Are there more fun things to do than spam Eldritch blast? No. Also even with 20 CHA you deal 42 damage average which is really good for a Cantrip. To compare a Fighter with a +3 2 handed weapon and 20 STR does an average of 58 damage. You get close to Fighter damage while still getting spell slots. Also depending on Sub Class you can boost that even more. You can get an extra 6 damage with Genie subclass (also you get to pick Wish as your level 9 spell but that's not the point).

all of them I'm pretty sure

Quote from jackwillrog >>

all of them I'm pretty sure

 What do you mean?

Well, an Artificer with an All-Purpose Tool and a multiclass into Wizard can use this along with Conjure Minor Elementals (2024) and the Bladesinger's Extra Attack feature to make a potential 6 attacks per turn at level 17, which would mean each attack does an extra 7d8 using a 9th level spell slot (which would automatically go for it's entire duration with no concentration with a prepped Glyph of Warding)

That's 6 potential attacks dealing a potential extra 42d8 damage...  per round.

Even without agonizing blast, this remains a great spell to know.  If you have low charisma, then getting it from warlock, magic adept: warlock (legacy), or spell sniper (legacy) would not be the best, and eldritch adept with the new eldritch invocation list would probably be better, as you could have its spellcasting modifier be intellect, wisdom, or charisma (we're not picking charisma in this example) and pick pact of the tome, giving you access to any spell.  As any spell obtained this way is a warlock spell, it still can't benefit from effects that only affect spells that belong to different class, like cleric's better and wisdom version of agonizing blast, potent spellcasting.  The only ways I've found to obtain eldritch blast and not have it be a warlock spell are via bard's magical secrets (legacy), which makes it a bard spell, and via all-purpose tool, which makes it an artificer spell.  Quite absurdly, you could use it as a wizard, sorcerer, or arcane cleric spell via wish, but then you're using a level 9 spell slot to cast a cantrip.

Quote from The_RJ >>

Well, an Artificer with an All-Purpose Tool and a multiclass into Wizard can use this along with Conjure Minor Elementals (2024) and the Bladesinger's Extra Attack feature to make a potential 6 attacks per turn at level 17, which would mean each attack does an extra 7d8 using a 9th level spell slot (which would automatically go for it's entire duration with no concentration with a prepped Glyph of Warding)

That's 6 potential attacks dealing a potential extra 42d8 damage...  per round.

 Bladesinger's extra attack feature only works with wizard cantrips, and, without homebrew, eldritch blast is not available as a wizard spell.

College of Valor's Extra Attack feature, on the other hand, works with any cantrip.  Furthermore, you could learn wizard spells as a bard too, since wizard is on the list of classes you can get spells from via Magical Secrets.

Edit: I've since realized I was looking at the new version of Bladesinger.  The legacy version's Extra Attack is exactly the same as new College of Valor's Extra Attack.  Do note that Extra Attack does not stack with Extra Attack, you can only use one version of the ability or another.  New College of Valor and legacy Bladesinger have the best versions.

Eldritch Machine Gun build is where you maximize the number of Eldritch Blasts beams per turn as possible.

Going 6 levels into either College of Valor bard or 6 levels into legacy Bladesinger wizard, but not both, gives you access to the ability to cast Eldritch Blast in place of an attack when you take the Attack action.  This can be combined with Haste (level 5 wizard/sorcerer or level 10 bard) to make the Attack action again, replacing the 1 attack with another cast of Eldritch Blast.  This can be further combined with level 2 fighter for Action Surge, which normally can't use the Magic action to cast Eldritch Blast, but with the aforementioned versions of Extra Attack, you can instead cast it once again as part of the Attack action.

Two ways to use Eldritch Blast as a bonus action, and you can go for both.  Going 2 levels into sorcerer gives you access to Quickened Spell, and pairing that with a level in warlock functionally gives you the coffeelock build, further fueling your Eldritch Machine Gun.  The other way to cast Eldritch Blast as a bonus action is to find or craft Illusionist's Bracers.

Eldritch Blast can be cast with a reaction via War Caster, provided you only target the triggering creature.  Having a weapon with Reach, such as a polearm or a whip, lets you use it at 10 feet away instead of 5 feet, letting you avoid the disadvantage, or you could take the Spell Sniper or Gunner feat to ignore disadvantage at 5 feet.  Sentinel with War Caster lets you cast it as a reaction against a creature within 5 feet of you that uses Disengage or hits a target other than you with an attack.  Do note that War Caster replaces your Opportunity Attack with a reaction cast of a spell, and it does not trigger Sentinel's speed reduction feature.