Shadowdark July homebrew challenge: Summer!

[Fenris-77]

I'm working on the location map that goes with the bandits.

 

[Twiggly the Gnome]

Inspired by summer in the US South...

Summertime Sadness
“Oh my God, I feel it in the air…”

3rd-level evocation
Casting Time: 1 action
Range: 60 feet
Area: 30-foot-radius, 20-foot-high cylinder (centered on a point within range)
Duration: Concentration, up to 10 minutes
Components: V, S

Description:
You conjure a dome of magical heat and clinging humidity that saturates the air and drains the stamina of those within. The area becomes thick with shimmering haze and oppressive moisture, making movement sluggish and breathing laborious.

• When a creature enters the area for the first time on a turn or starts its turn there, it must succeed on a Constitution saving throw or gain one level of exhaustion.
• Creatures already suffering from exhaustion make this saving throw with disadvantage.
• Creatures that are accustomed to extreme heat and humidity, such as those native to arid or tropical environments, make this saving throw with advantage. The DM determines which creatures qualify based on their background, physiology, or environmental adaptation.
• Creatures that do not breathe or are immune to exhaustion are unaffected.
• The area is lightly obscured by dense humidity and shimmering heat.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the radius increases by 10 feet for each slot level above 3rd.