the band, initially named fantom, was formed in march 1986 by then 18-year-old grzegorz "greg" obroślak, mariusz "mary" ostęp and wojtek "seki" sekuła in lublin, poland. soon after learning that there were many other bands already named "fantom", they decided to change the band's name to fanthrash, a name of an instrumental composition of the band. the band's line-up crystallized in september 1986, when the trio was joined by the drummer jacek "siwy" wróblewski and the vocalist less.