5e Monster: Crysmal

Stone Camouflage. The crysmal has advantage on Dexterity (Stealth) checks made to hide in rocky terrain.

Crystal Sense. The crysmal can pinpoint, by scent, the location of crystals and gems within 30 feet of it.

Innate Psionics. The crysmal's psionic ability is Charisma (save DC 12). It can innately manifest the following: At-will: control sound, detect psionics, empty mind, mind thrust (2d10) 3/day: psionic dimension door

ACTIONS
Sting. Melee Weapon Attack: +4 to hit, reach 5 ft. Hit: 16 (4d6+2) piercing damage.

Shard Spike (Recharge 6). Ranged Weapon Attack: +4 to hit, range 60 ft. Hit: 21 (6d6) piercing damage to the target and 5 (2d4) points of piercing damage to all creatures in adjacent squares.