Volcanic dragons dwell in Volcanoes, or rising volcanic islands, believed they dwell closer for that chaotic destruction. A Volcanic dragon’s lair is a dismal cave, grotto, or ruin that is at least partially flooded areas of lava.

Lair Actions

On initiative count 20 (losing initiative ties), the dragon takes a lair action to cause one of the following effects; the dragon can’t use the same effect two rounds in a row:

• Pools of lava that the dragon can see within 120 feet of it can summon 2 Fire Elementals. 
• If a Volcanic Dragon starts its turn in a pool of lava it can regain 5d10 hit points
• Magical darkness spreads from a point the dragon chooses within 60 feet of it, filling a 15-foot-radius sphere until the dragon dismisses it as an action, uses this lair action again, or dies. The darkness spreads around corners. A creature with darkvision can’t see through this darkness, and nonmagical light can’t illuminate it. If any of the effect’s area overlaps with an area of light created by a spell of 2nd level or lower, the spell that created the light is dispelled.

Regional Effects

The region containing a legendary Volcanic dragon’s lair is warped by the dragon’s magic, which creates one or more of the following effects:

• The land within 6 miles of the lair takes twice as long as normal to traverse since the plants grow thick and twisted, and the swamps are thick with reeking mud.
• The area can open up lava paths if enemies are caught in a lava path, they roll a Dex Save (17), On a fail, the enemy will take 4d8 fire damage, on a Succeed they avoid taking any damage.
• falling ash lightly obscures the land within 6 miles of the lair. a creature that does not fire elementals or dragons must roll a Con save (12), on a fail, they get on Exhaust point that can be removed after a Long rest. on a success, nothing happens.