Mighty Magus

you have to get a wizard down through around thirty levels of

dungeon, kill the dragon and back to the top again. There where

an increasing number of monsters to fight on the way down and

chests/rubbish piles to search for spellpower, life energy and

magic items. Traps in the floor did various nasty things and

have to be watched for carefully. The dungeon was automatically

generated each time the game was played, only to top and bottom

layers stayed the same.

The number keys cast the spells (higher the number, more powerful

the spell), and that spells make walls temporarily passable.