A warlock cannot learn this spell without taking enough levels of druid ir wizard to get level 4 spells and there's no feat that allows you to take a level 4 spell from another class. I suppose you could multiclass but the combo would be a nightmare

This at 9th level deals 12d8 damage per attack that hits. If you combine this with scorching ray lvl 8 you deal 2d6+12d8 damage for each ray that hits for a maximum of 18d6+108d8 damage if all attacks hit that's an average of 550 damage. For context the Tarrasque has 676 hp. 

They didn't this spell triggers on a attack magic missile isn't an attack since it has no attackroll.

Well this will be fun with scorching ray

Completely broken combat wise, but it ruins my favorite use of the old spell. To be able to summon an Azer to be my personal Blacksmith.

Now I'll have to plane shift and ask one in person.

Quote from theoriginaled >>

Make them expendable. Eg. Spell summons 4 wisps, 4 hits and spell ends. 

Or once per turn. Not per attack.

 The expendability would be fine if the trade off was no concentration required. Sign me up.

But Jim’s magic missile does

I feel like this spell should be renamed to something like "Conjure Area of Elements" as there are no elementals being summoned.

Also this should be changed to evocation since nothing is being summoned.

Quote from JumpySonicBear >>

For better balance; change the upcasting text to

Using a Higher-Level Spell Slot. The damage increases by 1d8 for every two spell slot levels above 4.

 Every two levels, 1d8? I think 1d8 per level would be fine, it's just 2d8 per level that's broken.

Highly relevant to this spell is the definition of an “attack” from Chapter 1 of the PHB.  If you are not following this structure, you are not making an attack, and do not trigger this spells damage  The 50 year tradition of insisting on a clearly unintended broken reading and then complaining about it being  broken not withstanding  

Making an Attack

When you take the Attack action, you make an attack. Some other actions, Bonus Actions, and Reactions also let you make an attack. Whether you strike with a Melee weapon, fire a Ranged weapon, or make an attack roll as part of a spell, an attack has the following structure:

1. Choose a Target. Pick a target within your attack’s range: a creature, an object, or a location.
2. Determine Modifiers. The DM determines whether the target has Cover (see the next section) and whether you have Advantage or Disadvantageagainst the target. In addition, spells, special abilities, and other effects can apply penalties or bonuses to your attack roll.
3. Resolve the Attack. Make the attack roll, as detailed earlier in this chapter. On a hit, you roll damage unless the particular attack has rules that specify otherwise. Some attacks cause special effects in addition to or instead of damage.

So, sadly... Magic Missile isn't an attack, but "Jim's Magic Missile" is! Just don't roll a "1," but it's probably best to just stick to Scorching Ray with this one. And Heyo, if you wanna take a 3 level dip into Thief Rogue you can cast Scorching Ray as an action then use a spell scroll to cast it again, all in the same turn, totally legal, but shhhhhh don't tell anyone, it can be our little secret...

I mean I’d rather face that than a 10th level Druid in beast form just beating the shite out of me in that emanation as intended. 

Agreed!

Quote from Liktor >>

Why do I get the feeling you all read the Spell wrong... Its said any attack ads the dmg. A Magic spell is no attack its a magic action surely you make an Attackrole for a single target but attack is the attack action and not the cast of a spell cause in the new rules the magic action is another point and not once called as attack in this. So i think this spell was just to make normal attacks of caster classes useable...

There seems to be some confusion here. Attack means any type of attack and that includes melee attacks, ranged attacks, melee spell attacks, and ranged spell attacks. These attacks can be part of the attack action, the magic action, or the bonus action (for example with the light property or dual wielder). If it meant "attacks made as part of the attack action", it would state it as such as it does in other places. So, this can be used with spells like Eldritch Blast or Scorching Ray because these spells make attacks.

Quote from WingedWolfAlpha >>

The max average damage you can do with this spell, by upcasting this to level 9, and summoning 10 magic missiles with level 8, would AVERAGE about 565.555 points of damage.

To put this into comparison, the tarrasque has 676 hit points (comparison, the tarrasque reflects missiles to the caster). And being how each missile always hits, you will one-shot ANY of the ancient dragons (gold and red has 546 hit points). Not to mention conjure minor elementals stays, so you can continue casting magic missiles. Wizards of the coast will change this I am sure.

Edit: If they change it, I hope we can have actual elementals again. Now you can no longer summon invisible stalkers. (Though I am a "forever DM" so I wouldn't even be able to)

 I'm not sure whether it would work with Magic Missile as Magic Missile technically doesn't make an attack. It just strikes the target and causes damage. Under Attack/Save, the spell lists "none". It would work, though, with Scorching Ray, Eldritch Blast, or Jim's gluten-free version.

And quite frankly, we don't know yet what HP monsters will have until February when the new MM comes out. Sure, if we compare this 2024 spell with the 2014 monster stats, combining a level 9 version of CME with a level 8 version of SR can result in 18d6 + 108d8 which can kill an ancient dragon in one turn. But we are also talking about a group of level 20 adventurers and per the DMG, a single Ancient Dragon would not be considered a deadly encounter for a group of 3+ characters of that level. And a Tarrasque that would be considered that would be unaffected by Scorching Ray.

Quote from Rider_Firesen >>

But Jim’s magic missile does

 That's because it's gluten-free.

Quote from Jock_Tamson >>

Highly relevant to this spell is the definition of an “attack” from Chapter 1 of the PHB.  If you are not following this structure, you are not making an attack, and do not trigger this spells damage  The 50 year tradition of insisting on a clearly unintended broken reading and then complaining about it being  broken not withstanding  

Making an Attack

When you take the Attack action, you make an attack. Some other actions, Bonus Actions, and Reactions also let you make an attack. Whether you strike with a Melee weapon, fire a Ranged weapon, or make an attack roll as part of a spell, an attack has the following structure:

 

1. Choose a Target. Pick a target within your attack’s range: a creature, an object, or a location.
2. Determine Modifiers. The DM determines whether the target has Cover (see the next section) and whether you have Advantage or Disadvantageagainst the target. In addition, spells, special abilities, and other effects can apply penalties or bonuses to your attack roll.
3. Resolve the Attack. Make the attack roll, as detailed earlier in this chapter. On a hit, you roll damage unless the particular attack has rules that specify otherwise. Some attacks cause special effects in addition to or instead of damage.

 

Yes, and as it says there: "Some other actions, Bonus Actions, and Reactions also let you make an attack." One such action would be the magic action with which you make a melee spell attack or a ranged spell attack like Scorching Ray or Eldritch Blast. Spell attacks are still attacks.

A Magic Missile is not an attack

The most harmful thing a spell like this does isn't how flagrantly broken it is. It erodes confidence in the game and it's designers. Anyone can look at this and immediately recognize it's OP to the point of not just being minmaxer bait but actively disruptive to play. So why can't WOTC?

not only is the damage busted on this, this takes so much of an L on flavor compared to the legacy conjure minor elementals. But Ao forbid conjurers actually summon creatures this edition, i guess.