Shadow Dragon

Regional Effects

Source: Monster Manual (2024)

The region around a shadow dragon’s lair is twisted by its presence, creating the following effects:

• Negative Energy Suffusion. Whenever a creature within 1 mile of the lair regains Hit Points from a spell, it subtracts 1d10 from the number of Hit Points regained.
• Stifling Shadows. Within 1 mile of the lair, effects that normally create Bright Light instead create Dim Light, and creatures there have Advantage on Dexterity (Stealth) checks.

If the dragon dies or moves its lair elsewhere, these effects end immediately.