After Satwa, Lailson started a new band, PHETUS, with Paulo Rafael and Zé da Flauta, one of the seminal groups of the Pernambuco's psychedelia on the beginning of the 70's.
First rock band to play at the Beco do Barato in May, 1973, the band featured Lailson on the craviola (12 strings guitar), Paulo Rafael on 10 strings guitar and Zé da Flauta on flute recorder and made a mixture of medieval sounds with hard rock creating a characteristic sonority, later on reinforced by electric bass (Lailson), electric guitar (Paulo Rafael) and transverse flute (Zé da Flauta) having Bira Total as guest drummer.
With light and sound effects and a teathrical stage performance, the banda produced a "baroque rock" with original songs that reflected the psychedelic universe of the counterculture of those times, with Vacas Roxas (Purple Cows) as their best known song. The musicians altered the spelling of their names and became Laylson, Paulus Raphael and Josephus to better suit the concept of the band.
With the song "Alagoas" Phetus originated the style that would be known as Pernambuco Rock and that would be developed by Paulo Rafael and Zé da Flauta in the following years.
In spite of having been the stars of a TV Universitária special and participated in many important shows and musical encounters at those times, no recordings or videos of the band survived from that period. Only in 2002 two Lailson's songs (Vacas Roxas and Anjos de Bronze) were recorded at the CD "A Turma do Beco do Barato" with the original trio and the participation of musicians from the Lailson Blues Band: Riva Le Boss, Jean Elton and Misael Barros.
In October 2011 the band regrouped for a live short appearance at the Rua da Moeda on downtown Recife, with the participation of Sérgio Eduardo on bass, Tovinho on keyboards and Piupiu on drums, bringing back to the old streets of Recife the psychedelic sound of the seventies.