Can you cast three blade cantrips in one turn with Haste, Spellblade, and Valor Bard?

Greetings everyone,

I'm trying to determine whether the following interaction allows casting a blade cantrip three times in one turn.

Relevant Features

Spellblade Feat (Valda's Spire of Secrets, p. 2) – Arcane Strike

When you take the Attack action on your turn, you can replace one of the attacks with casting Arc Blade, Burning Blade, Frigid Blade, or True Strike.

Haste

The target gains an additional action each turn. This action can only be used for the Attack (one attack only), Dash, Disengage, Hide, or Utilize action.

College of Valor Bard (Level 6) – Extra Attack

You can attack twice instead of once whenever you take the Attack action on your turn.

In addition, you can cast one of your cantrips with a casting time of one action in place of one of those attacks.

Proposed Sequence

1. Attack action (Extra Attack):
   • Replace one attack with a blade cantrip using the Valor Bard feature.
   • Replace the second attack with a blade cantrip using Arcane Strike.
2. Haste action (Attack):
   • Take the hasted Attack action (limited to one attack).
   • Replace that attack with a blade cantrip using Arcane Strike, since it triggers whenever you take the Attack action.

Question

Does this allow you to cast three blade cantrips in the same turn?

My reasoning is that Haste grants a separate Attack action, so Arcane Strike would trigger again for that action, even though it only includes one attack. Is that interpretation correct?

Yes, you can do that.

You can also just ask questions without running it through an AI tool first.

Maybe? The "one attack only" clause in haste can be argued as forbidding replacing that attack with casting a spell.

hahahah I  just used it to organize my thoughts to be more concise and easy to understand.

Quote from Pantagruel666 >>

Maybe? The "one attack only" clause in haste can be argued as forbidding replacing that attack with casting a spell.

I kinda think if that were the intent, it'd be stated more explicitly somewhere.

But when it comes to actual play I'm very much a "Rule of Cool" DM, so.

Quote from wagnarokkr >>

Quote from Pantagruel666 >>

Maybe? The "one attack only" clause in haste can be argued as forbidding replacing that attack with casting a spell.

I kinda think if that were the intent, it'd be stated more explicitly somewhere.

 I would lay odds on "we didn't think about that interaction at all".

When I DM abilities like War Magic, Arcane Strike and Extra Attack don't stack. They all say you can replace one attack per action, and once you do it that's it for that Action.

Haste is allowed because it's a different Action.

Just adding similar ways of casting several cantrips per turn:

Quote from Tarod_ >>

 So, if I'm understanding well, for a level 6 College of Valor / level 7 Eldritch Knight:

- Attack action: 1 Wizard cantrip + 1 cantrip

- Action Surge: 1 Wizard cantrip + 1 cantrip

- Haste: 1 Wizard cantrip OR 1 cantrip

(casting time of an action for all the cases) 

Quote from Tarod_ >>

[...]

- Attack action: 1 cantrip [WM] + 1 spell (level 1 or 2) [IWM] + 1 attack
- Attack Action (Action Surge): 1 cantrip [WM] + 1 spell (level 1 or 2) [IWM] + 1 attack
- Attack Action (Action Surge): 1 cantrip [WM] + 1 spell (level 1 or 2) [IWM] + 1 attack
- Haste (only one attack): 1 cantrip [WM]

(note: assuming all this follows the One Spell with a Spell Slot per Turn rule, and level 20 Eldritch Knight)

WM = War Magic; IWM = Improved WM

Indeed amazing and if u add the feat Spell Blade u add another Cantrip to each of those attack actions

Personally, I'd rule that each feature can only replace one attack per turn with a cantrip. So you couldn't double-dip on Arcane Strike, even with Haste

(Then again, I wouldn't be allowing anything from Valda's at my table anyway, but the principle would apply on a multiclass)

Everything can stack so long as what you're trying to stack together has a different name.
Coming back to that SAC entry: https://www.dndbeyond.com/sources/dnd/sae/sage-advice-compendium#SAC-Bard1

Yes, different effects stack if they don’t have the same name.