Alright, scoured the internet and couldn't find an answer. Can you use the smite spells on Flame Blade? I know you can't Booming/Green-Flame with Flame Blade, but can you add smite spells?

nope. I haven't looked at all of the "smites", but the ones i did see "melee weapon attack" while this spell says "melee spell attack", which is pretty much the same reason (i assume) for booming blade/green flame blade. Though in my game, I might allow smite for those (BB and GFB) because they are using the paladin's normal physical attributes for the attack. And since this is specifically a "Druid" spell, even though it's a weapons, that would be a hard sell in my game to allow. But per RAW, no. 

Now with wildfire it can be alot of fun🤷‍♂️

Quote from x4thosewhodied >>

Now with wildfire it can be alot of fun🤷‍♂️

No, it still sucks with Wildfire.  The level 6 ability for Wildfire Druids won't affect Flame Blade, because casting the spell Flame Blade doesn't deal any fire damage.  It's only when you use your action later that you'll deal fire damage.

its "when you cast a spell that deals fire damage" so flame blade falls into that category, as it is a spell that deals fire damage.  

Quote from Trewill91 >>

its "when you cast a spell that deals fire damage" so flame blade falls into that category, as it is a spell that deals fire damage.  

 
The spell creates a sword.  The spell does not deal fire damage.

You don't roll any dice when you cast the spell.  There's nothing to add the D8 to when you cast the spell.

It's not like Spiritual Weapon where you make an attack as part of casting the spell.  It's not like Booming Blade where you make an attack as part of casting the spell.  Making an attack is not part of casting Flame Blade.

Now that Tasha is out, this spell is also for sorcerer. I’ve got a hill dwarf dragon sorcerer that will be making good use of both this and dragon breath. Dragons breath hits more opponents and scales better. This spell is a melee attack (so it’ll proc absorb elements) and it lasts longer. They both have their niche on a sorcerer but it’s pretty shit on a Druid.

gets really interesting with circle of wild fire once you get your elemental

As a Dm I would allow it but only the other way around. The flame blade would have to be the primary hand and the off hand would be the other. Feats would make this moot. 

No, moonbeam is con save, wis wouldn't even make sense?

Wish this was on the Alchemist list. but I also wish that alchemical savant would apply every round which it wouldn't..

Would be a really cool spell otherwise for 'em

Can this be used for multi attack or is it DM discretion?

Quote from gabrielrockman >>

 

Quote from Trewill91 >>

its "when you cast a spell that deals fire damage" so flame blade falls into that category, as it is a spell that deals fire damage.  

 
The spell creates a sword.  The spell does not deal fire damage.

You don't roll any dice when you cast the spell.  There's nothing to add the D8 to when you cast the spell.

It's not like Spiritual Weapon where you make an attack as part of casting the spell.  It's not like Booming Blade where you make an attack as part of casting the spell.  Making an attack is not part of casting Flame Blade.

 By that logic draconic sorcerer's elemental affinity feature doesn't apply to things like dragons breath or investiture of flame.  the specific wording of the feature is "you gain a bonus to one damage roll of the spell."  It doesn't have to be a roll that occurs immediately when you cast the spell, it doesn't even have to be the first roll because otherwise it would say that it applies to the first roll.

Isnt it available to Sorcerer on Tasha's Cauldron

My half orc druid, circle of stars, with unbreakable spell concentration is gonna be a damn Jedi /Sith with this thing :D Maybe will even add "telekinetic" hehehe

If the Druid is inside of a "Darkness" sphere (Spell) and cast the Flame Blade, is the Darkness dispelled? Or the Flame Blade negated? Or both work, but the Blade does not illuminate?

******* says this is also available to sorcerers. who's wrong?

Quote from Trewill91 >>

Quote from gabrielrockman >>

 The spell creates a sword.  The spell does not deal fire damage.

By that logic draconic sorcerer's elemental affinity feature doesn't apply to things like dragons breath or investiture of flame.

Elemental Affinity doesn't apply either; that only works on spells that deal damage when you cast them, that's why it says "When you cast a spell" right at the start. That feature is specifically intended to not apply to spells that deal damage over multiple rounds; you have to keep casting to keep receiving the benefit.

Personally I don't think Flame Blade is too bad without stacking, it just isn't usually your best option in most situations, but if you're determined to play a melee Druid then it's not a bad option to have. The main problem with Flame Blade is that it compares quite poorly to Shadow Blade:

• While Shadow Blade has fewer dice, it has d8's vs d6's, and adds your normal damage bonus (your choice of DEX or STR thanks to finesse). Flame Blade has more dice so the damage at 2nd level is similar at earlier levels, and it has the advantage of using WIS (so better if you focus on WIS early).
• Fire is a more widely resisted/ignored damage type than psychic, but this depends a lot on your campaign; I've been facing a lot of undead and fiends lately and quite of a few of those ignore or resist psychic damage as well, so your mileage will vary.
• Flame Blade lasts longer; while most fights won't last more than a a minute, 10 minutes might be enough to cover two encounters to Shadow Blade's one.
• Flame Blade can only be used more than once per turn in rare cases, the only one I can think of off-hand is if you multiclassed as Fighter to get Action Surge (an extra action once per short rest). Shadow Blade is compatible with Extra Attack, Haste, a War Cleric's War Priest ability and so-on because it's a weapon.
• Flame Blade doesn't scale terribly well; whereas Shadow Blade gains a third dice at 3rd level, you need to go to 4th level with Flame Blade to gain a fourth d6 which isn't great, meaning for higher level slots Shadow Blade will quickly outpace Flame Blade on damage. It's really disappointing that Flame Blade doesn't scale at 1d6 per level, especially given the above point about only usually being able to attack with it once per turn, 1d6 scaling would still be worse than Dragon's Breath overall, but it'd have a niche for single target attacks thanks to its 10 minute duration.
• Shadow Blade can be thrown, and grants advantage when used in dim light and darkness. Flame Blade creates a 20 foot light.

Given that Druids can't take Shadow Blade I don't think Flame Blade is terrible, but it's better at lower levels, and mostly suits very niche builds; if you wanted to play a Druid as a bit of a tank for example. It might actually work okay with Circle of Spores since that circle can gain temporary hitpoints without wild-shaping, while dealing extra damage using their ranged reaction.

Quote from SnappingThragg >>

******* says this is also available to sorcerers. who's wrong?

 It's available to Sorcerers if your DM is allowing the Expanded spell list from optional class features in Tasha's guide

This is also avalible to sorcerers so why can't I select it in my spells list do I have to buy tasha's first or something?