Also known as the Splendid Forest Serpent, the Dragon of the Barrens, and the Keeper of the Mysteries of the Ssesha
Near the end of many a heroic venture or quest a brave band of adventurers upon return will find it necessary to seek out a sage, a wisened person, looking for the answer to a riddle, to decipher a map, or to unlock a geas or curse placed on one of their own. The strangest of quests, those touched by the madness of the fae, the eldritch influence of the outsiders and abominations, and those tainted by the hellish realms, are best met by the mysterious sage known only as Mugwort.
In the dank,dense areas of the world where the vigorous and the decaying are intertwined and indivisable, lives the wise bagabond. But getting him to impart his knowledge is quite a chore.
In the middle of an unimportant combat with some bandits a burst of wild magic transforms all of the PCs and their opponents in to random animals and monsters. They retain their intelligence (though not, of course, the ability of speech). They can either carry on the combat in their new forms, panic, or otherwise react how they see best. After about an hour, they return, unharmed, to their normal form.