Empowers a Minor Glyph to cause your Polymorph: Sheep spell to turn the target into a baby penguin.
Not only does this suggest that the days of learning separate poly spells for turtles, pigs and so on are gone, it's a cool way to help bring variety to a standard ability. Of course, since the vast majority of glyphs are for druids, we're seeing a lot more straigtforwardly useful ones, like Glyph of Frenzed Regeneration and Glyph of Shred, but Glyph of the White Bear looks pretty cool as a possible harbinger of what's to come: imagine a whole host of such glyphs for each and every druid form? Glyph of the Black Lion, anyone?
This suggests a lot of potential for personalization in the new Inscription profession. Anything you're looking forward to? I hope the ones for warriors are as cool, myself.