Sadhguru: Primarily It is just one. Another 1 is just a question of measurement. We estimated that If your residences are any where between 2000-2500 sq. ft., the Bhairavi Yantra would do. For residences bigger than that, we stated it's not plenty of and we presented the Avighna. Avighna also https://www.youtube.com/@Mahavidyabaglamukhi