Bhairava is referred to as Bhairavar or Vairavar in Tamil, where by he is commonly introduced as being a grama devata or village guardian who safeguards the devotee in 8 Instructions (ettu tikku). अट्टहासभिन्नपद्मजाण्डकोशसंततिं दृष्टिपातनष्टपापजालमुग्रशासनम् । अष्टसिद्धिदायकं कपालमालिकाधरं काशिकापुराधिनाथकालभैरवं भजे ॥७॥ Yantra āvaraṇa rituals typically follows exactly the same mantra https://trentonurvya.therainblog.com/29154946/bhairav-an-overview