Casting word is:

Explodium Cinderium

Quote from KYLEP >>

What is the DEX needed to save?

 It's the Spell Save DC for Casters, aka 8 + Proficiency + Attribut for casting (INT for Wizards/Eldritch Knights, WIS for Clerics/Druid, CHA for Warlock/Sorcerer/Paladin).
For Example if you're 18 Intelligence 5th Level Wizard casts Fireball, every enemy should roll a 15 or higher to take half damage (8 + 3 (Proficiency) +7 (INT Modifier))

I just wonder: Could a cunning artificer enchant a burrito so that it will cast fireball when the person who eats it next farts? I really hope this is possible.

I would say it would singe it but not outright light it on fire, but if you are DMing do what you feel would make sense. and it could still light stuff on fire but not treat them as burning objects.

That is op

i cast fireball 

Quote from alphagray >>

I'm sure that the bat guano is an old, old component. 

But it does feel like a kind of subtle dad joke.

Bat guano (which contained saltpeter) was commonly used to make explosives. This could be a symbolic representation and/or a dad joke (like many other spell components).

This spell lets you send all the goblin bois back to Lumbridge with the quickness. Hyahyahyahyahyahyahyahya WOW

Quote from Getweird6 >>

Might be a dumb quest but do you use your components every time you cast this and then find new ones? or just have to have them on you and you can cast it.

 This is explained in the spellcasting part of the PHB. It is that you can collect these, or you can use a form of spellcasting focus, such as an arcane focus or a holy symbol. You can also substitute the components if you have a component pouch. Those rules are ignored if one of two conditions are met

1. If it says (a piece of ..., which the spell consumes)
2. If it says (a ... worth ...GP)

On those conditions, you must have the components. Some classes make it so that these rules may be bypassed, such as the archdruid trait. If you want more, look at the spellcasting section in the PHB.

Is blight essentially better than fireball? It does way more damage at higher spell slots (as 8d8 is better than 9d6), but as a wizard necromancer, would more damage and grim harvest be better than 120 feet more range, area damage, and ignition of flammable objects?

Quote from FireStarBC >>

Is blight essentially better than fireball? It does way more damage at higher spell slots (as 8d8 is better than 9d6), but as a wizard necromancer, would more damage and grim harvest be better than 120 feet more range, area damage, and ignition of flammable objects?

 Nothing is better than fireball, theres just fireball

just fireball

just fireball

just fireball

just fireball

just fireball

just fireball

If your dm allows you to select what creatures you get then sure conjure animals is insanly op. the spell states you get to choose the option of how many cr creatures you summon not what shows up. For me as a dm I would mix it up. some wolves for sure so the spell slot isnt waisted, but some owls and rats as well so its still useful but the party doesnt get insane advantage with action economy.

Ayo this is showing up as a cantrip for my Divine Soul sorcerer, anyone able to tell me why?

DEX save for half damage. So you roll 8d6 damage- say 3, 5, 3, 6, 3, 2, 5, 4, for a total of 31 damage. If I succeed on my DEX throw, I take only 15.5 damage rounded down, or 15 damage. It's one of the challenges for a wizard- Agile monsters can avoid potentially 24-odd points of damage, which is *huge* in 5e.

I will eventually end up doing this.

Player: I didn’t ask for the room size. I SAID CAST FIREBALL!!!!

DM: Ok....

Player when it hurts everyone: 🤬

why does it have to be 8d6 holy god in hell this is the equivalent to a time bomb 

I evoke the name of the ancient fire, 

the spark that brought about creation.

Burn my enemies, reduce them to ash,

consume them in rightful immolation!

Ooga ooga booga duga?

The page number here is wrong, "Basic Rules, pg. 241". The Basic Rules don't even have 241 pages. Fireball is on page 94 of Basic Rules for Dungeons & Dragons.