Now that the official previews for Core Set 2021 is over, Wizards of the Coast has jump-started the previews for the new Magic: The Gathering product called Jumpstart, and today the company revealed a new cycle of unique land cards that lets you choose a color when each of them enters the battlefield, and you can add one mana of the chosen color or the selected color of each specific land. The lands include Thriving Grove, Thriving Bluff, Thriving Isle, Thriving Heath, and Thriving Moor. They enter the battlefield tapped so it's no surprise that they're just Commons, but these new lands will be legal in Vintage, Legacy, and Commander. These cards are well-designed, and I'm surprised that they didn't release them in earlier sets.
Check them out:
Thriving Grove

Thriving Bluff

Thriving Isle

Thriving Heath

Thriving Moor

Key descriptions for Jumpstart:
Core Set 2021 is set to release on July 3 with Prerelease events scheduled from June 26 to July 2. Jumpstart is set to launch on July 17.
Related: Core Set 2021 Buy-a-Box Promo Comes With A Jumpstart Bonus