|This material from the 5th edition SRD is published under the OGL|
|Medium monstrosity (shapechanger), neutral|
|Armor Class: 14|
|Hit Points: 52 (8d8+16)|
|Speed: 30 ft.|
|Skills: Deception +6, Insight +3|
|Condition Immunity: charmed|
|Senses: darkvision 60 ft., passive Perception 11|
|Challenge: 3 (700 xp)|
| Shapechanger. The doppelganger can use its action to polymorph into a Small or Medium humanoid it has seen, or back into its true form. Its statistics, other than its size, are the same in each form. Any equipment it is wearing or carrying isn’t transformed. It reverts to its true form if it dies.
Surprise Attack. If the doppelganger surprises a creature and hits it with an attack during the first round of combat, the target takes an extra 10 (3d6) damage from the attack.
Multiattack. The doppleganger makes two melee attacks.
Slam. Melee Weapon Attack: +6 to hit, reach 5 ft., one target Hit: 7 (1d6+4) bludgeoning damage.
Read Thoughts. The doppelganger magically reads the surface thoughts of one creature within 60 feet of it. The effect can penetrate barriers, but 3 feet of wood or dirt, 2 feet of stone, 2 inches of metal, or a thin sheet of lead blocks it. While the target is in range, the doppelganger can continue reading its thoughts, as long as the doppelganger’s concentration isn’t broken (as if concentrating on a spell). While reading the target’s mind, the doppelganger has advantage on Wisdom (Insight) and Charisma (Deception, Intimidation, and Persuasion) checks against the target.
|Challenge Rating||3 +|
|Experience Points||700 +|
|Features||Shapechanger +, Ambusher +, Surprise Attack +, Multiattack +, Slam + and Read Thoughts +|
|Hit Dice||8d8+16 +|
|Hit Points||52 +|