Thorned Sulfurlord

Burning Tangle. The ground within 10 feet of the thorned sulfurlord is difficult terrain.

Hell Core. At the start of each of the thorned sulfurlord's turns, each creature within 10 feet of the sulfurlord takes 7 (2d6) fire damage. If the thorned sulfurlord takes cold damage, this trait doesn't function at the start of its next turn.

Like Calls to Like. The thorned sulfurlord knows if a creature within 100 feet of it is evil-aligned or not.

Root (3/Day). As a bonus action, the thorned sulfurlord sends its roots deep into the ground. For 1 minute, the sulfurlord's speed is halved, it is immune to effects that would move it, and it can't be knocked prone.

Multiattack. The thorned sulfurlord makes two sulfur slam attacks or two fiery spike attacks.

Sulfur Slam. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 14 (2d8 + 5) bludgeoning damage plus 9 (2d8) fire damage. The target must succeed on a DC 17 Constitution saving throw or be blinded until the end of its next turn.

Fiery Spike. Ranged Weapon Attack: +6 to hit, range 60/240 ft., one target. Hit: 12 (3d6 + 2) piercing damage plus 9 (2d8) fire damage.

The World Shall Know Fire (Recharge 5-6). The thorned sulfurlord targets a creature that has taken fire damage from it within the last minute and causes a burst of fire to expand out from that creature in a 30-foot-radius. Each creature in the area, including the target, must make a DC 17 Dexterity saving throw, taking 35 (10d6) fire damage on a failed save, or half as much damage on a successful one. The fire ignites flammable objects in the area that aren't being worn or carried.