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.
Can you cast two spells one round?
Yes, you can cast more than one spell per turn/round. The only specific restriction is that if you cast a spell as a bonus action, you can’t cast a non-cantrip spell during your turn. Cast a spell as a bonus action, then cast a cantrip as your action or reaction.
Can you cast two spells?
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 use Action surge twice in one turn?
On your turn, you can take one additional action on top of your regular action and a possible bonus action. Once you use this feature, you must finish a short or long rest before you can use it again. Starting at 17th level, you can use it twice before a rest, but only once on the same turn.
Can you cast another Cantrip with action surge?
If you cast a spell, such as healing word, with a bonus action, you can cast another spell with your action, but that other spell must be a cantrip. Keep in mind that this particular limit is specific to spells that use a bonus action. For instance, if you cast a second spell using Action Surge, you aren’t limited to casting a cantrip with it.
Can you cast more than one spell in a round?
There are a few ways to cast multiple spells per round: Reaction spells (even when it is not your turn it is still the same round). Any bonus action spell (spell must have casting time of 1 bonus action or allowed by a feature) and a cantrip (must be a cantrip) as an action (can’t cast reaction spells until turn ends, but can still be this round).
Can you cast more than one Cantrip in a round?
Feather fall is not a cantrip with a casting time of 1 action so you can’t cast it on the same turn as a quickened spell. Note that you can cast more than one non-cantrip spell in a round. For example, you can cast two fireballs, one with an action and one with the second action provided by action surge.
Can a PC Cast a bonus spell using action surge?
Action (Any Spell) -> Action Surge (Any Spell?) Casting a Bonus Spell will limit all Action Spells during your TURN to Cantrips (1 action casting), non-cantrip spells or cantrip (>1 action casting) will exclude the ability to use a bonus spell during your TURN, mattering which comes first.
