In Special Op. Sector 5, which is west of the Gate Crystal, run past the
Silicon Tortoise and keep going until you see a rock on the right side of the
tracks. On the far side of that rock there will be a chest. If there are two
of them, the silver-looking one is Ithuno. If the silver chest is not there,
reload your game. Examine the silver chest to provoke Ithuno. Let it chase
you all the way back to the entrance of Special Op. Sector 5. At this point,
just keep stealing until you get a Deathbringer. If you need to heal, go back
one screen and heal before returning (Ithuno will still be there, like the
Lindbur Wolf). Don't move back two screens or you will reset the area. Once
you've obtained your Deathbringer, head back to the Gate Crystal and save
your game. Now quit and reload. Repeat the entire process if you want another
one. Rinse and repeat as many times as you like.