4th-level Spell: Irradiate

High Magic (Evocation)

You create an eerie, pulsating blue light within a 30-foot-radius sphere centered on a point you choose within range. The bright light spreads around corners, and it lasts until the spell ends.
When a creature moves into the spell's area for the first time on a turn or starts its turn there, it must make a Constitution saving throw. Constructs automatically succeed on saving throws against this spell.
On a failure, the creature's maximum hit points are reduced by 7d4, its speed lowers by 5 feet, and it receives a -2 penalty to attack rolls, ability checks, saving throws, and spell and ability DCs. A creature suffers cumulative effects with each failed saving throw. If a creature fails its saving throw five times, it dies.
Additionally on a failure, the creature emits light in a 5-foot radius and cannot benefit from being invisible. Each failed save increases the radius by 5 feet.
All effects caused by this spell (except death) end when the spell ends.

• At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the maximum hit point reduction increases by 1d4 per slot level above 4th.

Source: SDS (Sickening Radiance)

• Casting Time: 1 action
• Range: 120 feet
• Components: V, S
• Duration: Concentration, up to 10 minutes
• Ritual: No