Insect Plague
Swarming locusts fill a 20-foot-radius Sphere centered on a point you choose within range. The Sphere remains for the duration, and its area is Lightly Obscured and Difficult Terrain.
When the swarm appears, each creature in it makes a Constitution saving throw, taking 4d10 Piercing damage on a failed save or half as much damage on a successful one. A creature also makes this save when it enters the spell's area for the first time on a turn or ends its turn there. A creature makes this save only once per turn.
Using a Higher-Level Spell Slot. The damage increases by 1d10 for each spell slot level above 5.
Insect Plague 5e 2024 vs. 2014 edition differences
The 2024 version specifies "up to 10 minutes" duration, but no change in mechanic. It clarifies the creature makes the saving throw only once per turn, whereas the 2014 version implies a saving throw when entering or ending its turn without this clarification. Damage and effects remain the same.