“Find a dragon and cast a ‘MON ZO GOR SAR’ spell then press ‘ESCAPE’ to pause the game. Now whilst holding down the left ‘ALT’ key type in: ‘LORD LIBRASULUS SMITES THEE DOWN’ (with spaces). Unpause the game and kill the creature, now when the dragon dies it should leave behind a Firestaff and the party should also be invincible.”
Unfortunately, it is just pure invention. This was originally published in ST Action magazine (UK) as an April Fools joke written by Nick Clarkson who was the editor of the magazine. Many other magazines and web sites reproduced it without actually checking that it worked. Below are some examples.
Chaos Strikes Back Fake Cheat
ST Action (United Kingdom), Issue No 24 April 1990, Page 53