Yavana

"In destroying what it does not understand, mankind would destroy itself."

Yavana is an infamous Antivan Witch of the Wilds who is known as the beast of the Tellari swamps, and is encountered in Dragon Age: The Silent Grove.

Trivia

 * During the Steel Age, a nobleman from Kirkwall, Xenon the Antiquarian tried to acquire eternal life by making a deal with an Antivan "Witch of the Wilds". His wish was granted however he didn't ask for eternal youth so his body eventually decayed. It is not known if this Antivan witch is Yavana or another one.
 * In a dialogue between Zevran and Morrigan, Zevran mentions a Witch of the Wilds who traveled far from home to settle in the Tellari Swamps, which is probably referring to Yavana.