 Psiliches are powerful users of psionic powers, who have used non-magical means to achieve this state of undeath.The Suel Imperium also had its own form of liches, the "Suel lich"—powerful wizards who learned the secrets of transferring their souls from one body to the next—at the cost of the bodies burning out in brief periods.Josh Hrala, for "Geek & Sundry", reported that "liches really took off in modern gaming and fiction when "D&D" co-creator Gary Gygax officially added it to the game back in 1975 in the supplement called "Greyhawk".