Casting Time: 1 bonus action
Range: Self
Components: V, S, M
Duration: Concentration
, up to 10 minutes
Damage Type: Fire
You evoke a fiery blade in your free hand. The blade is similar in size and shape to a scimitar, and it lasts for the duration. If you let go of the blade, it disappears, but you can evoke it again as a Bonus Action.
As a Magic action, you can make a melee spell attack with the fiery blade. On a hit, the target takes Fire damage equal to 3d6 plus your spellcasting ability modifier.
The flaming blade sheds Bright Light in a 10-foot radius and Dim Light for an additional 10 feet.
The damage increases by 1d6 for each spell slot level above 2.
Material Component:
a sumac leaf
Verbal Component:
Cultas di Incendio
Verbal Component (Alternative):
Forged from fire, not metal made; I summon forth this great flame blade.
Classes: Druid, Sorcerer
Domain: Fire
Tags: Damage
Source: Player's Handbook (2024) (page 275)
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Other Planes and Effects
Below is information about this spell as it relates to other planes and area of effects (i.e. underwater). Some of the information is pulled official D&D sources (such as books and the twitter feeds of D&D officials), but other information is derived from forums and online discussions. As always, it is up to the DM to decide how they wish to handle spell effects.
Underwater - Verbal Component
Official rules have been verified by Jeremy Crawford - "No rule prohibits verbal components from working underwater. Keep in mind that if you're talking, you're not holding your breath." Hence, while submerged underwater and holding its breath, a creature can cast a spell that requires a verbal component. After casting the spell, if the creature can't breathe underwater, it immediately runs out of breath. The creature can survive for a number of rounds equal to its Constitution modifier (minimum of 1 round).
Underwater - Fire Effects
The PHB p198 clearly states "Creatures and objects that are fully immersed in water have resistance to fire damage." Other than that, there are no official rules regarding fire spells underwater. But, as always, it is always up to the DM to decide if fire spells should have different effects (i.e. half range, half area of effects, half duration, etc.). In addition, Jeremy Crawford has clearly stated, regarding a fireball vaporizing water, "Nothing in the rules causes a fireball to vaporize water. Magic ≠ physics. DMs may apply whatever magical/scientific logic they like."