Actions

Slam 

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10  2d6+3 bludgeoning damage, and the doppelixir attaches to the target. While attached, the doppelixir doesn’t attack. Instead, at the start of each of the doppelixir’s turns, the target loses 10 2d6+3  hp due to blood loss. The doppelixir can detach itself by spending 5 feet of its movement. It does so after it drains 20 hp of blood from its target or the target dies. A creature, including the target, can use its action to detach the doppelixir by succeeding on a DC 13 Strength check.

Telepathic Urge

The doppelixir mentally urges one creature it can see within 60 feet of it to attempt to drink it. The target must succeed on a DC 11 Wisdom saving throw or be charmed for 1 minute. While charmed, the target must move on its turn toward the doppelixir by the safest available route, trying to get within 5 feet of the doppelixir to drink it. The creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If the doppelixir attacks the target, the effect also ends. If the target attempts to drink it, the doppelixir can use a reaction to make one Slam attack with advantage against the target. If the target’s saving throw is successful or the effect ends for it, the creature is immune to the doppelixir’s Telepathic Urge for the next 24 hours.

Bonus Actions

Imitative Liquid

The doppelixir imitates one common or uncommon potion, oil, or other alchemical substance until it uses this bonus action again to end it or to imitate a different liquid. If the doppelixir takes no acid, fire, or poison damage on the round it is slain, a creature can collect its remains, which can be used as the liquid it was imitating before it died.