This trick requires two players. When you find a Strength or Accuracy Glyph, have both players stand on it. Then, both players should press A simultaneously. If done correctly, two lines should appear, stating that both players' skills have
improved, and the Glyph should glow again. The Glyph is now infinite. You must do this the first time you use the Glyph. Health and Energy Glyphs also can do this, but you have to do the same thing only on the fourth time.