Since Action Surge gives you a whole other action and not a another turn you can certainly cast another spell so long as you did not use a Bonus action spell.
What can you do with action surge?
With Action Surge, your fighter will be able to perform two major actions per turn, instead of just the standard one. You’ll also get to use your bonus action alongside this additional main action, meaning that you could potentially move, attack twice, and cast a spell in the space of a single turn.
What can you do with a quickened spell?
It lets you cast a spell that requires an action as a bonus action…..freeing up your action to do any other thing you could do as an action. Like grapple, dash, disengage, dodge, hide, make a weapon attack, help (to give an ally advantage), use a magic item, or cast a cantrip.
Can a Sorcerer cast a cantrip with a Quicken spell?
Sorcerers with Quicken Spell can cast spells with a casting time of one action with the bonus action. Still, the general rule of casting spells with the bonus action applies always: if you can a spell with a bonus action, you can cast a spell with the action on the same turn only if it is a cantrip.
Can you cast a spell with a bonus action on the same turn?
Still, the general rule of casting spells with the bonus action applies always: if you can a spell with a bonus action, you can cast a spell with the action on the same turn only if it is a cantrip. This confused me a bit as a new player too.
Can you cast two spells in one turn with quickened metamagic?
All things you cant normally do without quickened metamagic. If you want to cast 2 leveled spells in 1 turn use twinned spell or multiclass for action surge. It is for game balancing. Wait thats dumb what the heck is the point of quicened spell if it doesnt let you cast two leveled spells!?
