Sakis Tolis (born June 29, 1972 is a Greek musician best known as the vocalist/guitarist of Rotting Christ. He is also known as Necromayhem. He has recently produced some of the band's albums and contributed as session keyboardist.
He also played guitar in a black/death metal band Thou Art Lord, which features members from several other prominent Greek extreme metal groups, such as Necromantia and Septic Flesh. He endorses J.Nunis custom made guitars. He has used a custom guitar with the motto "Non serviam" inlaid in the fretboard many times in concert and in the studio.
Both he and his brother Themis are longtime fans of AEK FC.