Doppelganger

Medium Monstrosity, Neutral
AC 14    Initiative +4 (14)
HP 52 (8d8 + 16)
Speed 30 ft.

		MOD	SAVE				MOD	SAVE
STR	11	+0	+0		INT	18	+4	+4
DEX	14	+2	+2		WIS	11	+0	+0
CON	12	+1	+1		CHA	14	+2	+2

Skills Deception +6, Insight +3
Immunities Charmed
Senses Darkvision 60 ft.; Passive Perception 11
Languages Common plus three other languages
CR 3 (XP 700; PB +2)

Bonus Actions

Shape-Shift. The doppelganger shape-shifts into a Medium or Small Humanoid, or it returns to its true form. Its game statistics, other than its size, are the same in each form. Any equipment it is wearing or carrying isn't transformed.

Actions

Multiattack. The doppelganger makes two Slam attacks and uses Unsettling Visage if available.

Slam. Melee Attack Roll: +6 (with Advantage during the first round of each combat), reach 5 ft. Hit: 11 (2d6 + 4) Bludgeoning damage.

Read Thoughts. The doppelganger casts Detect Thoughts, requiring no spell components and using Charisma as the spellcasting ability (spell save DC 12).

Unsettling Visage (Recharge 6). Wisdom Saving Throw: DC 12, each creature in a 15-foot Emanation originating from the doppelganger that can see the doppelganger. Failure: The target has the Frightened condition and 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.