@Conathan any spellcaster has their own spell save DC for all spells, changed only by things such as the Wand of the Magi.

DC is calculated by 8+your proficiency bonus+your spellcasting ability modifier. Spell attack modifier is prof. bonus+spellcasting modifier. For example, a 10th-level Sorcerer with a Charisma score of 20 would have a Spell Save DC of 8+4+5=17.

Dexterity is the saving throw. Your spell dc is 8+ proficiency modifier+ intelligence modifier/ charisma if your sorcerer. 

Technically it doesn't specify that it destroys the body, unlike spells such as disintegrate, so the body, while probably very badly damaged, remains and can be brought back through a revivify.

but a necromancer could bring that player back, right?

Quote from Slippymclach12 >>

Technically it doesn't specify that it destroys the body, unlike spells such as disintegrate, so the body, while probably very badly damaged, remains and can be brought back through a revivify.

 One would presume that the injuries suffered from the collision of a flaming meteor would irreparably mangle the body. Thought it is not specifically stated, the DM might say that the damage is too much to leave the body intact. Revivify states that it isn't even powerful enough to restore severed limbs. True Resurrection can generate a new body.

Love the spell but personally don't like the flavor. I'd love to see the spell delay causing damage until the beginning of the caster's next turn and give enemy casters disadvantage on countering this spell. Good for your BBEG to cast and see the PC's run to take cover or scramble to take measures against it. Also pressures your players to think rather than depend on the party spell caster to make that counterspell.

While this spell is a great as a damage dealer (120 average damage is juicy)...this spell has some other good RP uses.  For example...functioning as the equivalent of the atom bomb for your setting.  This spell can devastate entire cities in one shot.

Meteor Swarm:  For when you absolutely, positively, have to nuke the entire city

-Spectre

Quote from SpectreOfTheInkverse >>

While this spell is a great as a damage dealer (120 average damage is juicy)...this spell has some other good RP uses.  For example...functioning as the equivalent of the atom bomb for your setting.  This spell can devastate entire cities in one shot.

Meteor Swarm:  For when you absolutely, positively, have to nuke the entire city

-Spectre

 Entire cities is a tad exaggerated, but it can at the very least ruin a block or so.

This doesn't make sense. What's worse, having one meteor fall on you, or having two meteors fall on you?

Certain spells such as Fireball and Meteor swarm just do more damage than average. Wizards wrote about this already - some things are over powered, and that's fine. This isn't overpowered in the same way that Hypnotic Pattern is either.

It's caster dependent. Spells in 5th edition do not have a DC associated with them, but is instead 8 plus a characters Spellcasting ability modifier and their proficiency bonus. The average DC for this spell would be 19 (8+5+6)

Spells dont have Dc, its the caster that sets the Dc, 8 + Proficiency Bonus(at this level its a 6) + your spellcasting ability modifier that should be at least 5, so thats 19 or more for the save

I’m getting this in mad mage ITS SO GOOD

kool

When you absolutely positively have to stop that army of slavering undead

wouldn't it be determined by the stats of the wizard/sorc casting it?

So if my wizard cast it the saving throw would be a dex 19

overpowered

Quote from Finn_is_a_DM >>

This doesn't make sense. What's worse, having one meteor fall on you, or having two meteors fall on you?

 That's the thing, since they all hit simultaneously, you are effectively not getting hit by more than one even if the radius overlaps. Think of it like this, when you place the radius to overlap, they collide mid-air before hitting the ground, destroying a bit of each other so they can fit wherever they are set to hit.

This spell is incredibly powerful as it is already, making the overlapped damage stack would just be ridiculous.

One of my most favorite spells so destructive!