Magic Eater: The black salamander is immune to any damage by spells or magical weapons. When it takes magical damage half of the damage is transformed into healing. This cannot put the creature above it's max HP.
Spellcasting. The [monster name] is a 3rd-level spellcaster. Its spellcasting ability is Wisdom (+7 to hit with spell attacks spell save dc 16). The Black Salamander has following spells prepared:
3 times daily: Inflict wounds at 3rd level.
1 time daily: Circle of Death
The Black Salamander can make 1 tongue attack and two claw attacks as its action.
Tongue. +9 to hit, Reach 10 ft. 4d6 necrotic damage
Claw. Melee Weapon Attack: +9 to hit, reach 5 ft., 1 d6 slashing, 1 d6 necrotic.
3 legendary actions
2 actions. The black salamander can cast a spell
1 action. The black salamander can make a claw attack.