This is homebrew, submitted by a member of the community.
Mineral Mephit
Mineral Mephit
Small Elemental, neutral evilSmall Elemental, neutral evil
Death Burst. When a Mineral Mephit dies, it explodes in a burst of jagged stone and crystals. Each creature within 5 feet of it must make a DC 11 Dexterity saving throw, taking 7 (2d6) slashing damage on a failed save, or half as much damage on a successful one.
False Appearance. While a Mineral Mephit remains motionless it is indistinguishable from a natural formation of rock and crystals.
Innate Spellcasting (1/day). A Mineral Mephit can innately cast upon itself a spell with effects identical to those of Barkskin, causing additional clusters of hard crystals to emerge on its hide and enhancing its armor class to no less than 16. It requires no material components and its innate spellcasting ability is Charisma.
[b][i]Death Burst.[/i][/b] When a Mineral Mephit dies, it explodes in a burst of jagged stone and crystals. Each creature within 5 feet of it must make a DC 11 Dexterity saving throw, taking 7 ([2d6]) slashing damage on a failed save, or half as much damage on a successful one.
[b][i]False Appearance.[/i][/b] While a Mineral Mephit remains motionless it is indistinguishable from a natural formation of rock and crystals.
[b][i]Innate Spellcasting (1/day).[/i][/b] A Mineral Mephit can innately cast upon itself a spell with effects identical to those of [spell]Barkskin[/spell], causing additional clusters of hard crystals to emerge on its hide and enhancing its armor class to no less than 16. It requires no material components and its innate spellcasting ability is Charisma.
Actions
Fists. Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: 3 (1d6) bludgeoning damage.
Crystal Breath (Recharge 6). A Mineral Mephit can exhale a 15-foot cone of crystal fragments. Each creature in that area must make a DC 10 Dexterity saving throw, taking 7 (2d6) slashing damage on a failed save, or half as much damage on a successful one.
[b][i]Fists.[/b] Melee Weapon Attack:[/i] [+2] to hit, reach 5 ft., one target. Hit: 3 ([1d6]) bludgeoning damage.
[b][i]Crystal Breath (Recharge 6).[/i][/b] A Mineral Mephit can exhale a 15-foot cone of crystal fragments. Each creature in that area must make a DC 10 Dexterity saving throw, taking 7 ([2d6]) slashing damage on a failed save, or half as much damage on a successful one.
Legendary Actions
Details
Mineral Mephits are composed of elemental Earth and Positive Energy, look like small, sturdy, winged creatures made of rock and covered with clusters of crystals, and are among the most attractive and self-assured monsters of their sort. They are also the strongest of the Mephits, although this is not saying much in absolute terms. Mineral Mephits often have access to largely-worthless hoards of white, red, purple, and other crystals that they will cheerfully misrepresent the value of and attempt to use as trade goods or currency. In addition to Terran, Mineral Mephits are also able to speak Quidan, the language of the Positive Energy Plane. Mineral Mephits are composed of elemental Earth and Positive Energy, look like small, sturdy, winged creatures made of rock and covered with clusters of crystals, and are among the most attractive and self-assured monsters of their sort. They are also the strongest of the Mephits, although this is not saying much in absolute terms. Mineral Mephits often have access to largely-worthless hoards of white, red, purple, and other crystals that they will cheerfully misrepresent the value of and attempt to use as trade goods or currency. In addition to Terran, Mineral Mephits are also able to speak Quidan, the language of the Positive Energy Plane.Shout outs: Stacey, Adam Fowler, Amanda Kettles, Angelo Anderson, Appreciate Witch of Life, AstroLass, bilbens baggo, Brian Nunziato, Bryan Sheairs, Brysen Packer, Bryson Waits, Burlyfighter, Caitlin W., chris wilson, Christopher Allbritton, CJMAXP, Connor, Dalton Elliott, Damon Carrington, Daniel Edwards, Darrya Keshvari, David Schraff, Dragons With Jetpacks, Elisa Martinez, eric sun, Ezzela1891, Federica Frezza, Gordon Alexander Fallon, Gundar Wez, Iofire, Irate The Pirate, Ivee Quinn, Jade Arrowood, Jake Lane, Jeremiah Walker, Jess, Joe Dalby, John Nazario, JollyGamer, Jonathan Lekse, Jordan Brazeal, Josh Braden, Joshua David Maddox, Justin Snyder, Kerry Melton, Kevin, KFB_Patreon, KingHavok1217, Kingyo Senpai, Kyle Clark, Lisa Tucker, Liz Fontain, Lizzie, Lou Bliss, Luke P, Mario Pizzamiglio, Mark L, Matt Price, Matt Yates, Max Hops, Maxwell Mayer, Michael Hamilton, Millergendraft, mtnman1979@aol.com, Mx Charlie, Mylon Schroder, Nahellion, Nathan, Nicholas Zamora, Nick Soucy, Phil Mehl, Phillip P Torchia, Pythor Sen, R., Rachel Anderson, Ray Bissonnette, Remora Jewel, Robert Rich, Robert Skadsem, Ryan Flagg, SallySparrow132, Sarah Holland, Serafina Moon, Shane Andrews, ShortyMcgibble, Sik Makoyi, Siren, Stefan Gottschalk's, Steve Rosenlund, Stuart, Syn21, That Video Editor Nic, thea musing, Trev909, Vedie V, Vincent Drone, Warren Clarida, Wesley Muncy, XMrMonkyx ., Zachary Burgess-Hicks, zachary gee, Zealot23, Zee Livezey
Their contribution stands as a beacon of hope for all adventurers!

