Yes.

Players handbook specifically states "1 sorcery point for cantrips" on the twin spell section.

Quote from DaLyla >>

If you wanna go the extra mile (and maybe infuriate your DM), multiclass sorcerer and use metamagic to twin/quicken the cantrip to send 8 beams and become an Eldritch Blasting machine-gun

 that. sounds. AMAZING!!! im gonna do it right away

DM: With you’re passive perception of somehow 22, you awaken in the middle of the night to strange environmental sounds you’re unfamiliar with. Gazing out of your tent, you notice a fleet of shadows approaching from hundreds of feet away-

Player: How many?

DM: What?

Player: How many hundreds?

DM: Roughly 500, why?

Player: ...

DM: ...

Player: Eldritch Blast.

Question, What color is it? or is that your player's choice? 

is there any difference between a Celestial warlock's blast and an Archfiend's or even an Old ones"?  it doesn't specify.

Quote from ZaknafienCalicus >>

Question, What colour is it? or is that your player's choice? 

is there any difference between a Celestial warlock's blast and an Archfiend's or even an Old ones"?  it doesn't specify.

 If you want there to be different colours then you can have different colours. You could have a great old ones blast be black, a archfiends one be red, a celestial's beam be white, and an archfeys be green 

BUT THESE ARE ONLY OPTIONAL

Me: How many times did i cast Eldritch Blast!?

My brain:

All of my friends know this as "nut shot Blast" because of what I did with my warlock to one of the bosses

im just starting d&d , can someone tell me why is this Cantrip so good?? it's just 1d10 damage

Quote from Zarc2003 >>

im just starting d&d , can someone tell me why is this Cantrip so good?? it's just 1d10 damage

As far as I know it's because it's D10 damage. Remember Cantrips are cast at will and don't take up a spell slot. It also upgrades at higher levels. Compare it to any other damaging cantrip in the game should highlight it's capacity for destruction.

Quote from Zarc2003 >>

im just starting d&d , can someone tell me why is this Cantrip so good?? it's just 1d10 damage

 It's 1d10 of force damage, there is almost nothing that resists that type, when coupled with a number of Eldritch Invocations (EI) you get your CHA modifier added to each beam. So at lvl 17 that's 4 times 1d10+5. There are also Invocations that slow/pull or push back the target. Each beam has a separate to hit roll so the chances of hitting are better than one roll. This means you also have more chance to crit and more chances to have the EI's trigger. And that's just the plain standard Eldritch Blast without any items or transformations. For non 'locks it's not as good by a long shot.

spell sniper lets you learn a cantrip

“When you Cast a Spell that Targets only one creature and doesn't have a range of self, you can spend a number of sorcery points equal to the spell's level to target a second creature in range with the same spell (1 sorcery point if the spell is a cantrip).”

Eldritch blast after level 5 cannot be twinned.

Why is this spell so good, its just 1d10 damage? (asked previously; let me add to the answers in an attempt at clarity)

There are some other aspects of the spell, beyond raw 1d10 damage, which can make it slightly better than other options / comparable spells. And people get excited over these slight differences. Though some of the difference is people's preference based on common situations (so individual preference may vary). Compare Eldritch Blast to Fire Bolt

• Users
  • Fire Bolt - wizards, sorcerers, artificers, even eldritch knights (fighter sub-class)
  • Eldritch Blast - Warlocks only - advantage eldritch blast because rarer is cooler :-)
• Damage
  • Fire Bolt - 1d10 fire damage, can target objects; so you can set curtains on fire from across a room, but some monsters resist or are immune to fire, like fire giants (immune). Of course some may be vulnerable to fire (though not frost giants or white dragons so I stopped looking).
  • Eldritch Blast - 1d10 force damage, creatures only; so you cannot damage say a locked door (rules as written), but few monsters resist (or a vulnerable) to force damage.
    • advantage eldritch blast as most people prefer reliable damage (1d10) over running into monsters that resist (or are immune) to fire bolt damage, or over the ability to damage flammable objects at range.
  • Damage Bonus
    • Fire Bolt - no
    • Eldritch Blast - no - but, warlocks have the eldritch invocation class feature one of which is agonizing blast which a lot of warlocks take, allowing them to add their CHA modifier to the damage roll
      • advantage eldritch blast. Not every warlock takes the agonizing blast invocation but enough do that it becomes noticeable that fire bolt does not have the damage bonus.
      • You may notice people disliking warlocks, or eldritch blast with agonizing blast, as it takes the seeming flexibility of the class (what spells and invocations you want to choose) but restricts it to one optimal choice. Saying that 'all' warlocks are eldritch blast warlocks is like saying that 'all' sorcerers just cast fireballs. Yes there are other ways to play but there is also an obvious, simple, effective choice.
  • Flexibility
    • Fie Bolt - None
    • Eldritch Blast - other eldritch invocations can make other changes to eldritch blast. Like extend the range of the spell, which is normally 120ft for each, or push targets up to 10 ft. Not big differences but still some flexibility that may be useful in certain scenarios and which some players may find fun or find ways to use effectively often enough to make Eldritch Blast 'better' than Fire Bolt. For example knocking an escaping enemy that thought they were a safe distance away off of their flying carpet to fall to their death.
  • Higher Levels
    • At higher levels (5, 11 & 17) both cantrips can do more damage.
      • Fire Bolt-"This spell's damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10)." It is still a single bolt of fire attacking a single creature/target. One bad attack roll and you miss.
      • Eldritch Blast - "The spell creates more than one beam when you reach higher levels: two beams at 5th level, three beams at 11th level, and four beams at 17th level. You can direct the beams at the same target or at different ones. Make a separate attack roll for each beam."
        • The raw damage is equivalent. At 11th level the three eldritch blasts do 3 x 1d10 damage.
        • But at 11th level with agonizing blast you also add your CHA modifier to each hit so (assuming +4 CHA bonus, and all beams hit) actual damage is (3x1d10)+(3x4). Basically the eldritch blast+agonizing blast warlock is doing +12 damage compared to a wizard of the same level and equivalent spell. The wizard will not be doing warlock level 11 damage until level 17 when they get their 4th d10 of fire bolt damage. And at level 11 the agonizing blast warlock is doing an extra 12 damage while at level 17 the fire bolt wizard is only doing somewhere between 1 - 10 more damage. So more damage, and more reliable damage (damage bonus rather than rolling a damage dice).
        • More flexibility, as you can target multiple targets if you choose.
        • If targeting a single target repeatedly each bolt is an independent attack roll so more chance that at least one might hit. Against harder to hit targets this can be more useful than the occasional miss against easy to hit targets. (Even better with agonizing blast.) And, again, people prefer the consistency of having some attacks hit over the all-or-nothing of Fire Bolt.

So it is not that this cantrip is super-good but, on average or in average play, it is noticeably better than the equivalent spell.

Problem is, normally you don't see that far away, except you target something Really big

Quote from Jaysburn >>

Quote from Whynot2 >>

I would expect a DM to impose Disadvantage at that range, or something similarly penalizing. That's almost 2 full football fields. Perspective is thrown off. Now if it was an auto hit, or save to avoid, sure. You are still making a ranged attack roll though with EB.

 

Well, that would be wrong to do.  Both the Eldritch Spear invocation and the Spellsniper feat are designed to allow you to attack over long range, and spells don't have a Short/Long range.  Imposing disadvantage on that is a huge, and rude, nerf.  If a player wants to spend an entire Feat and Invocation on increasing the range of Eldritch Blast, they should be allowed to do so.

As for @Nereze's question of "can you even see 600 feet away?"
Sure you can, given the right conditions.  You can see for miles on end, in clear conditions with high ground/flat land.  There are spells with much greater range than this, such as Meteor Swarm.

 Yeah, but normally you aren't able to discern if something is hostile in 600 ft distance or even be able to distinguish same sized humanoids well

And meteor swarm is more like "destroy everything in this area" and not "Headshot this single individual target" 

Quote from Kazamaraz >>

Quote from Jaysburn >>

Quote from Whynot2 >>

I would expect a DM to impose Disadvantage at that range, or something similarly penalizing. That's almost 2 full football fields. Perspective is thrown off. Now if it was an auto hit, or save to avoid, sure. You are still making a ranged attack roll though with EB.

 

Well, that would be wrong to do.  Both the Eldritch Spear invocation and the Spellsniper feat are designed to allow you to attack over long range, and spells don't have a Short/Long range.  Imposing disadvantage on that is a huge, and rude, nerf.  If a player wants to spend an entire Feat and Invocation on increasing the range of Eldritch Blast, they should be allowed to do so.

 

I would personally say that it would depend on how the player actually gets this feat and the type of campaign being run. If this is just a one and done, not RP heavy, or similar type of campaign, then who cares, bam they level up and can do it. If it's a more RP heavy campaign though, I fully expect the player to actually be doing something like training every day as a morning routine for a while to hit things at that range, and because of that the feat actually has meaning to it. You could still twist something to make it work with a variant human that starts with the spellsniper feat and gets the invocation later, but personally I don't think I know many people that wouldn't get something like Warcaster as their starting feat instead.

Side note, for the people wondering, DMG has a section mentioning visibility outdoors. You can see up to 2 miles (over 10k ft) on a clear day so long as your vision isn't obscured by terrain. So yeah you can see 600 ft and even 1200 ft no problem.

 Yes, you can see this far

But it would still be difficult to hit something specific from 600 ft

See it like this

A normal bullet from a revolver could travel easily 600 ft

But trying to hit something with a bullet in 600 ft distance is something else

You can cast it at weddings

you can't twin spells that are able to target more then one creature so u can only twin eldritch blast as long as it's only one beam... but u can't twin the 4 beams to make it 8... sry

Good thing that magic initiate exists