"Well, you could learn from the books and learn from that what you need to spend points on, and what you can trade for," he said, simply. He had no clue that Yugi thought that metal was a common ingredient for armor. Then again, Yugi probably had no idea that Clef's odd looking, but still seemingly cloth, clothes probably could stop more damage from hitting him than a full Arthurian suit of armor could. Ah, magic.