Shatapatha Brahmana 1.5.1 mentions an interesting thing about the priests of the Devas and Asuras:
He steps beside the Hotri's seat, takes one stalk of (reed) grass from the Hotri's seat and casts it outside (the sacrificial ground), with the formula, 'Ejected is the wealth-clutcher (parâvasu, lit. "off-wealth")!' Formerly, namely, the Hotri of the Asuras was one Parâvasu by name: him he thereby ejects from the Hotri's seat.
He then sits down on the Hotri's seat, with the formula, 'I here sit down on the seat of the wealth-bestower (arvâvasu, lit. "hither-wealth")!' for one Arvâvasu by name was the Hotri of the gods, and on his seat he accordingly sits down.
The former Hotri of the Devas could be one of the three previous Agnis I asked a question for but I want to know about Who is this Parâvasu who was the former Hotri for the Asuras and how did he become their Hotri?
If it helps another section of the same scripture also mentions two priests of the Asuras that I had asked a question about earlier and this guy could be one of those but I want to know it conclusively through scriptural references.