I am building a 5th level Elven Bladesinger for a campaign I am joining. Looking forward to 6th level, the bladesinger gets two attacks, one of which can be a cantrip. The question is - can I cast Booming Blade or Green Flame Blade twice with my attack action?
No. You can replace one of your attacks from the Attack action with a cantrip.
Booming Blade or Green Flame Blade usually require using the Cast a Spell action in order to use. The Bladesinger feature lets you cast Booming blade/green flame blade or another cantrip and make one weapon attack in addition to the cantrip.
What about the rule that allows for casting two spells/ attack action so long as one of them is a cantrip?
There is no such rule.
What I think you’re thinking of is that the rule that states that if you cast a spell as a bonus action, the only other spells you can cast during the same turn are one-action cantrips.
As a note on the whole can only cast a cantrip if you used your bonus action to cast a spell, you can get out more than one cantrip in two ways.
The first is via the quicken spell metamagic which would require either multiclassing into sorcerer or using the metamagic adept feat.
The second is via Action Surge which would require multiclassing into fighter.
So a wizard (bladesinger) 6/sorcerer 2/fighter 2 can potentially do a single turn where they use 1 spell (which can be a cantrip), 2 spells (which must be cantrips) and 2 normal attacks. But you'd only get to do that one turn once per short rest.
If I were to look towards a build to go all the way to level 20, I would probably look towards a wizard (bladesinger) 17/ fighter (eldritch knight) 3 for the additional cantrips (more options) and a few extra 1st level spells while using a feat to get metamagic. With wizard 17 you'd still get a 9th level spell.
So if your goal is to go for a booming/green-flame blade master fighter, that is a potential build to consider.
there are caveats. I'd say is the cost of quickening a spell via quicken spell. The cost is 2 points irrelevant of level and so I'd save it for stronger spells than cantrips, you could even use it to cast haste so you get an additional normal attack for up to 10 rounds and +2AC. Also if you used action surge on a different turn to quicken spell, you could do two spells of any level instead and so that has far more utility/options than just a booming/green-flame blade master.
I am building a 5th level Elven Bladesinger for a campaign I am joining. Looking forward to 6th level, the bladesinger gets two attacks, one of which can be a cantrip. The question is - can I cast Booming Blade or Green Flame Blade twice with my attack action?
Thanks in advance-
-TC
No. You can replace one of your attacks from the Attack action with a cantrip.
Booming Blade or Green Flame Blade usually require using the Cast a Spell action in order to use. The Bladesinger feature lets you cast Booming blade/green flame blade or another cantrip and make one weapon attack in addition to the cantrip.
What about the rule that allows for casting two spells/ attack action so long as one of them is a cantrip?
There is no such rule.
What I think you’re thinking of is that the rule that states that if you cast a spell as a bonus action, the only other spells you can cast during the same turn are one-action cantrips.
Ah! thank you for clarifying.
As a note on the whole can only cast a cantrip if you used your bonus action to cast a spell, you can get out more than one cantrip in two ways.
The first is via the quicken spell metamagic which would require either multiclassing into sorcerer or using the metamagic adept feat.
The second is via Action Surge which would require multiclassing into fighter.
So a wizard (bladesinger) 6/sorcerer 2/fighter 2 can potentially do a single turn where they use 1 spell (which can be a cantrip), 2 spells (which must be cantrips) and 2 normal attacks. But you'd only get to do that one turn once per short rest.
If I were to look towards a build to go all the way to level 20, I would probably look towards a wizard (bladesinger) 17/ fighter (eldritch knight) 3 for the additional cantrips (more options) and a few extra 1st level spells while using a feat to get metamagic. With wizard 17 you'd still get a 9th level spell.
So if your goal is to go for a booming/green-flame blade master fighter, that is a potential build to consider.
there are caveats. I'd say is the cost of quickening a spell via quicken spell. The cost is 2 points irrelevant of level and so I'd save it for stronger spells than cantrips, you could even use it to cast haste so you get an additional normal attack for up to 10 rounds and +2AC. Also if you used action surge on a different turn to quicken spell, you could do two spells of any level instead and so that has far more utility/options than just a booming/green-flame blade master.