[Astral Planes] Potion of Planar Infusion (Patreon)

Potion, very rare

Meticulously extracted from the touch of starlight, the light of a black hole, and the sound of a vacuum, this silver liquid forms a swirling, spiral galaxy when left to settle.

Planar Infusion. After imbibing this potion, your mind, body, and soul become bound with that of an entity from another plane. Roll a d8 and consult the table to determine the entity. You gain the statistics of that creature as per the polymorph spell. These effects last until 10 minutes elapse, you fail a saving throw against the banishment spell (which banishes the planar entity, not you), or your assumed form is reduced to 0 hit points. Dispel magic does not end the potion’s effects.

Consequences. After the duration elapses, your mind is strained and can even break. Make a DC 15 Intelligence saving throw. On a failure, you take 6d6 psychic damage and are insane until you finish a long rest. While insane, you can't take actions, can't understand what other creatures say, can't read, and speak only in gibberish. A greater restoration spell cast on you ends this effect.

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