D&D 5E Action Surge+double cast

[gyor]

With War Caster feat, War Magic, Eldrich Strike, Arcane Charge, Haste already cast on you, you can cast a spell, attack as bonus action, cast another spell as an action surge action which is buffed by Eldrich Strike, teleport, attack again with your haste action, and then use your move action.

 

[Thaumaturge]

I'll...just never mention this thread to my players.

Ever.

Thaumaturge.

 

[Sword of Spirit]

I don't think so.

Bonus Action
A spell cast with a bonus action is especially swift. You must use a bonus action on your turn to cast the spell, provided that you haven’t already taken a bonus action this turn. You can’t cast another spell during the same turn, except for a cantrip with a casting time of 1 action.

In this case, I'm going to go with specific beats general for RAI.

Generally you can use a bonus action to cast a spell with a casting time of bonus action, and still use your regular action to cast a spell (though it is limited to a cantrip).

Specifically, action surge allows you to take an additional action.

RAW would indicate that you can either cast spells as above, plus take another non-spell action, or you can cast two regular spells but not a bonus action spell. That seems odd.

I believe RAI should be that the specific extra action granted by action surge overrides the rules about not casting another non-cantrip spell on the same turn as a bonus action spell, therefore with action surge you could either cast cantrip, bonus action spell, plus regular spell, or you could cast regular spell plus regular spell. The extra action ignores the presence of the normal action and bonus action.

Just my take on it, but it seems pretty straightforward. The weird way RAW would have it sounds like 3e and 4e rules-lawyering rather than the simplicity 5e is going for. You just get an extra action, period.

 

[Li Shenron]

In this case, I'm going to go with specific beats general for RAI.

Generally you can use a bonus action to cast a spell with a casting time of bonus action, and still use your regular action to cast a spell (though it is limited to a cantrip).

Specifically, action surge allows you to take an additional action.

RAW would indicate that you can either cast spells as above, plus take another non-spell action, or you can cast two regular spells but not a bonus action spell. That seems odd.

I believe RAI should be that the specific extra action granted by action surge overrides the rules about not casting another non-cantrip spell on the same turn as a bonus action spell, therefore with action surge you could either cast cantrip, bonus action spell, plus regular spell, or you could cast regular spell plus regular spell. The extra action ignores the presence of the normal action and bonus action.

Just my take on it, but it seems pretty straightforward. The weird way RAW would have it sounds like 3e and 4e rules-lawyering rather than the simplicity 5e is going for. You just get an extra action, period.

Simplicity was already botched when they decided to have swift spells at all, but there have been too many people in the recent past wanting some healing spells that can be cast without taking your whole turn, that WotC was almost forced to have swift spells in 5e.

As for RAI, it's hard for me to guess it...

My thought is that the RAI of swift spells is to allow an attack (mostly to Clerics and Druids) in the same round, either with a weapon or with a weapon-like spell i.e. cantrips.

As for the RAI of action surge, I think it's to allow any extra combat action, including an Eldritch Knight spell, but IMHO they weren't thinking at all about the interaction with swift spells, and possibly they weren't even thinking about two "full" spells in the same round (this would have certainly raised some browse, although it's limited to once per short rest). IMHO it was an oversight, possibly because they just assumed somewhere there was a rule limiting spells per round (maybe there was in previous editions?).

 

[mach1.9pants]

Well IMO Action Surge allows another action, so any action you could normally do. Why should it be anything different? If you can cast a spell as an action, then cast a spell - if you can attack as an action you can do that too. So as an Encounter Power (in 4E terms) you can cast two spells in a round.

The 7th level War Magic thing, I don't know about PHB, but probably irrelevant to this