McKennaii magic mushrooms are a relatively new variety of magic mushrooms, named after Terence McKenna, an American ethnobotanist and philosopher who was an advocate for the use of psychedelic substances. The mushrooms are a hybrid strain of Psilocybe cubensis, a species of psychedelic mushroom that is commonly found in many parts of the world.

The exact origins of these mushrooms are not clear, but they are believed to have been developed by Dutch growers in the early 2000s. The strain quickly gained popularity in the Netherlands and other parts of Europe, and is now widely available in many countries.

The McKennaii mushroom strain is known for its high potency, with users reporting intense visual and auditory hallucinations, as well as profound experiences of euphoria, introspection, and spiritual insight. The strain is also known for its distinctive appearance, with large, dense caps that are often covered in a thick layer of white spores.

Despite their relatively recent development, McKennaii mushrooms have quickly become one of the most popular strains of magic mushrooms among enthusiasts and are widely regarded as one of the most powerful and transformative psychedelic experiences available.