Can You Quicken a Twinned Spell?
Direct Answer
No, you cannot quicken a twinned spell. According to the rules of the game, the Twinned Spell metamagic option and the Quickened Spell metamagic option have no exceptions that would allow them to be used together.
Background
Twinned Spell is a metamagic option that allows a caster to target a second creature with a spell that normally only targets one creature. Quickened Spell is a metamagic option that allows a caster to cast a spell as a bonus action, rather than a regular action.
Why You Can’t Quicken a Twinned Spell
Metamagic Options Don’t Mix
The reason you can’t quicken a twinned spell is that the rules of the game do not allow metamagic options to be combined. Each metamagic option has its own specific rules and limitations, and there is no exception that would allow them to be used together.
Twinned Spell is a Special Case
Twinned Spell is a special case because it allows a caster to target a second creature with a spell that normally only targets one creature. This means that the spell is not being cast as a bonus action, and the Quickened Spell metamagic option is not applicable.
Quicken Spell is a Bonus Action
Quickened Spell is a metamagic option that allows a caster to cast a spell as a bonus action. This means that the spell is not being cast as a regular action, and the caster is not taking an action to cast the spell.
Combining the Two
If you were to try to quicken a twinned spell, you would be combining two metamagic options that are not meant to be used together. This would create a situation where the spell is being cast as a bonus action, but is also targeting a second creature. This would not be a valid use of the spells, and would likely result in errors and inconsistencies in the game.
Conclusion
In conclusion, you cannot quicken a twinned spell. The rules of the game do not allow metamagic options to be combined, and Twinned Spell is a special case that is not applicable to the Quickened Spell metamagic option. If you are looking to cast a spell as a bonus action, you should use the Quickened Spell metamagic option. If you are looking to target a second creature with a spell, you should use the Twinned Spell metamagic option.