STOP Steiner time!
***This trick REQUIRES Adelbert Steiner to be weilding the Blood Sword (Reward from the stellazio coin lady in Treno after 4 coins).***
After Marcus and Steiner escape their bird cage, Steiner needs to run out of the room, but guards (Why are they all ladies...it's so weird) keep running after him and attacking. STOP! Let them fight you. The blood sword cures Steiner for the damage he hits. SO kill Marcus off, then just tap x for an hour and boom! You're crazy high level with a bunch of sword cards. I did it to level 30. If you have a controller with a turno option you can set that and just walk away.
More tricks, tips and cheats for this game are right here - Final Fantasy IX cheats
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