changer. can change into anything that has a Challenge rating of 20 or lower
Ambusher. The doppelganger has advantage on attack rolls against any creature it has surprised.
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 20 (5d6) damage from the attack.
Multiattack. The doppelganger makes three melee attacks.
Slam. Melee Weapon Attack: +7 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 100 feet of it. The effect can penetrate barriers, but 10 feet of wood or dirt, 7 feet of stone, 5 feat of metal, or a wide 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.
Opportunity Multi attack does 3 slam attacks
Description
Doppelgangers are devious shapeshifters that take on the appearance of almost anything, throwing off pursuit or luring victims to their doom with misdirection and disguise and powerful monster there can change into.
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