Is there any source that says that it was specifically Diku that led to EverQuest? LPMud etc also dates from 1989/90 and also had mana, as had Populous as someo

Is there any source that says that it was specifically Diku that led to EverQuest? LPMud etc also dates from 1989/90 and also had mana, as had Populous as someone else mentions. There must be a game before that that also used mana, I think GURPS is the most likely mentioned so far.