Dryad

The Dryads of Ravnica are closely aligned with the Selesnya Conclave. Dryads are believed to be in contact with the "Worldsoul" and Mat'Selesnya, the parun of the guild, was formed from the union of multiple dryads. The dryads known as the Trostani act as guildmasters and dryads that are collectively called the Conclave seek to spread the message of Mat'Selesnya among the people of Ravnica. The leafy hair of Ravnican dryads changes color with the seasons.

Refferences:

https://mtg.gamepedia.com/Dryad

https://scryfall.com/card/gpt/83/dryad-sophisticate