Hellish Blast

Melee or Ranged Spell Attack: +9 to hit, reach 5 ft. or range 120 ft., one target. Hit: 12 (2d6 + 5) fire damage plus 9 (2d8) poison damage.

Hell's Servitors (1/Day)

The devilbound gnome magically calls 1d4 devils with a challenge rating of 4 or lower, or it calls 1 devil with a challenge rating of 6 or lower. The called Fiends arrive in 1d4 rounds, acting as allies of the gnome and obeying its spoken commands. The Fiends remain for 1 hour, until the gnome dies, or until the gnome dismisses them as a bonus action.

To Hell and Back (1/Day)

The devilbound gnome sends one creature it can see within 60 feet of it hurling through Hell. The target must make a DC 17 Wisdom saving throw. On a success, the target takes 35 (10d6) fire damage as Hell pulls on the creature. On a failure, the target is incapacitated and disappears, as it takes a quick trip through the nightmarish landscapes of Hell. At the end of the gnome's next turn, the target reappears in the space it previously occupied, or the nearest unoccupied space, and takes 55 (10d10) psychic damage.

Spellcasting

The devilbound gnome casts one of the following spells, requiring no material components and using Charisma as the spellcasting ability (spell save DC 17): At will: detect magic, minor illusion, prestidigitation 3/day each: command, dimension door, invisibility 1/day each: fly, haste, wall of fire