Can I Twin cast fireball?

No, Fireball can't be twinned. Only single-target spells can be twinned.

Can you twin Firebolt?

She may only twin the spell if she elects to target a creature (and the spell is unable to target more than that one creature). In your particular case, Firebolt is only ever a single bolt (unlike, say, Eldritch Blast). So it is eligible to be twinned provided you are using it to target a creature.

How many fireballs can you cast per turn?

There's an additional restriction when casting a spell as a bonus action as described above, but the limiting factor on spellcasting is actually the fact that you only have one action per turn and at most one bonus action per turn.

Can you twin smite?

All the smite spells have Range: Self, so none of them can be used with Twinned Spell.

Can sorcerers double fireball?

No. From the chapter on Spellcasting: "(If you use a bonus action to cast a spell,) you can't cast another spell during the same turn, except for a cantrip with a casting time of 1 action." The reason is balance - as you may have noticed, two fireballs in one turn is a bit much.

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Can you cast 2 fireballs with action surge?

You can cast 2 leveled spells with actions surge.

Can you cast two spells at once?

To explain: the actual rule is that if you cast a spell as a bonus action, the only other spells you can cast that turn are cantrips with a cast time of one action. So if you quicken a spell, you can get two spells cast, one of which has to be a one-action cantrip, which eldritch blast is.

Can you twin hex?

You can't twin hex

To be eligible, a spell must be incapable of targeting more than one creature at the spell's current level. Hex is able to target more than one creature if the first one dies so it is ineligible. This targeting is referred to as "curse"ing but the effect is the same.

Can you twin ice knife?

Ice knife is capable of targeting more than one creature because of the AOE dex save. So you cannot twin it.

Can you twin disintegrate?

You could, however, twin spells like Haste, Polymorph, Greater Invisibility, or Disintegrate. Whether or not the spell is concentration has no bearing on the Twinned Spell metamagic option.

Can you cast 2 cantrips?

You cannot cast two cantrips during one action. That's why many cantrips scale as you level. To further explain what you read, if you cast a spell as a bonus action, you can only use your action to cast a cantrip. For example, there's a monster next to you.

Can you twin green flame blade?

Green flame Blade can't be twinned

For a spell to be twinnable it needs to only target one creature. As clarified in the PHB errata: To be eligible, a spell must be incapable of targeting more than one creature at the spell's current level.

Can you twin booming blade?

Yes, Booming Blade can be twinned, because a range of Self is not the same thing as a range of Self (5-foot radius) When a spell has a range of "Self", it definitionally targets the caster themselves, and no one else.

Can you twin holy weapon?

You cannot twin spiritual weapon, as each creature attacked by the spell becomes a target of it, meaning that the spell does not pass Twinned Spell's requirement of being "incapable of targeting more than one creature".

Can you Twin Shadow Blade?

So normally you can't twin shadowblade because of range self, but if used in conjunction with booming blade it's now possable to twinned spell it.

Can Chaos Bolt be twinned?

Chaos bolt can be twinned spell. It does not initially target two creatures at any level of the spell. As a result of the damage roll after the spell resolves it can possibly target an additional one target thus not breaking metamagic rules for twinned spell.

Can you twin spell one target?

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).

Can you Twin Dragons Breath?

Dragon's breath can affect more than one creature with the exhalation. It therefore can't be twinned.

Can I Twin cast haste?

Haste lets you make attack rolls that can affect more than one creature before the spell expires. So haste is not a valid spell for twinning.

Can you twin crown of stars?

RAW: Yes, Crown of Madness can be Twinned

The charmed target must use its action before moving on each of its turns to make a melee attack against a creature other than itself that you mentally choose. The target can act normally on its turn if you choose no creature or if none are within its reach.

Can you quicken and twin a spell?

No, you can not.

Neither the Quickened Spell nor the Twinned Spell metamagic have exceptions allowing them to be used with other metamagics, so in the absence of other features allowing you to use multiple metamagics on the same spell you can not used Twinned Spell with the same spell that you used Quickened Spell on.

Can you cast fireball on yourself?

But one of the players made a decision I did not expect: he cast fireball on his own character to try to pry open the creature's mouth at the expense of his own health. As per the description of the fireball spell: A bright streak flashes from your pointing finger to a point you choose within range [...]

Can warlocks cast fireball?

Fireball is only available to Pact of the Fiend Warlocks.