Casting Time: 1 action
Range: 300 ft (20 ft
)
Components: V, S, M
Duration: Concentration
, up to 10 minutes
Damage Type: Piercing
Save: Constitution
Swarming, biting locusts fill a 20-foot-radius sphere centered on a point you choose within range. The sphere spreads around corners. The sphere remains for the duration, and its area is lightly obscured. The sphere's area is difficult terrain.
When the area appears, each creature in it must make a Constitution saving throw. A creature takes 4d10 piercing damage on a failed save, or half as much damage on a successful one. A creature must also make this saving throw when it enters the spell's area for the first time on a turn or ends its turn there.
When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d10 for each slot level above 5th.
Material Component:
a few grains of sugar, some kernels of grain, and a smear of fat
Verbal Component:
Contagio Insectum
Verbal Component (Alternative):
I call forth a writhing storm, a chittering mass of insects swarm.
Classes: Cleric, Druid, Sorcerer
Domain: Nature, Tempest
Tags: Damage
Source: Player's Handbook [5th Edition] (page 254)
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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).
