Casting Time: 1 action
Range: Self
Components: V, S, M
Duration: 10 minutes
Damage Type: Fire
Wispy flames wreathe your body for the duration, shedding Bright Light in a 10-foot radius and Dim Light for an additional 10 feet.
The flames provide you with a warm shield or a chill shield, as you choose. The warm shield grants you Resistance to Cold damage, and the chill shield grants you Resistance to Fire damage.
In addition, whenever a creature within 5 feet of you hits you with a melee attack roll, the shield erupts with flame. The attacker takes 2d8 Fire damage from a warm shield or 2d8 Cold damage from a chill shield.
Material Component:
a bit of phosphorus or a firefly
Verbal Component:
Protego di Incendo
Verbal Component (Alternative):
Mystic powers that I now wield, summon forth a burning/chilling shield.
Classes: Druid, Sorcerer, Wizard, Rogue
Domain: Fire, Protection
Tags: Buff, Damage
Source: Player's Handbook (2024) (page 274)
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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."
