Armor Class 16
Hit Points 52 (8d8 + 16)
Speed 30 ft., fly 60 ft., burrow 20 ft.
Saving Throws DEX +3, CON +4
Skills Perception +2, Stealth +3
Damage Resistances necrotic
Senses Blindsight 10 ft., Darkvision 60 ft., passive Perception 12
Languages Common, Draconic; telepathy 120 ft.
Challenge 2
Rend. m +4, reach 5 ft. Hit: 9 (2d6 + 2) Slashing damage plus 3 (1d6) Necrotic damage.
Ruinous Breath (Recharge 5–6). con DC 12, each creature in a 15-foot Cone. 13 (3d8) Necrotic damage. Half damage.
Time-Warping Breath. wis DC 12, each creature that isn't currently affected by this breath in a 15-foot Cone. The target's Speed is halved, it can't take Reactions, and it can take either an action or a Bonus Action on its turn, not both. It repeats the save at the end of each of its turns, ending the effect on itself on a success. After 1 minute, it succeeds automatically.
FRAiF, p. 277