Ultima 4: Quest Of The Avatar cheat codes:
Go in the secret dungeon entrance at lord british's castle, and
use four down spells, then use and exit spell. You will
appear next to dungeon hythloth. re-enter dungeon, explore and
you will find a magic orb. Use the magic orb, cast exit spell,
re-enter and repeat as wanted. (you need over 600 HP to do
this!) This gives you +5 intelligence, strength, and dexterity,
but takes OFF 600 hp each time!
Also, head west from dungeon hythloth to find the balloon.