Gnome Cunning. Grottenelle has advantage on all Intelligence, Wisdom, and Charisma saving throws against magic.
Stone Camouflage. Grottenelle has advantage on Dexterity (Stealth) checks to hide in rocky terrain.
Spellcasting. Grottenelle is a 9th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 14, +6 to hit with spell attacks). The mage has the following wizard spells prepared:
Cantrips (at will): fire bolt, light, mage hand, prestidigitation
1st level (4 slots): detect magic, mage armor, magic missile, shield
2nd level (3 slots): misty step, suggestion
3rd level (3 slots): counterspell, fireball, fly
4th level (3 slots): greater invisibility, ice storm
5th level (1 slot): cone of cold
Innate Spellcasting. Grottenelle's innate spellcasting ability is Intelligence (spell save DC 14). Grottenelle can innately cast the following spells, requiring no material components:
At will: nondetection (self only)
1/day each: blindness/deafness, blur, disguise self
Dagger. Melee or Ranged Weapon Attack: +5 to hit, reach 5 ft. or range 20/60 ft., one target. Hit:4 (1d4 + 2) piercing damage.