Jasna, Relentless Siegeseer

Flying, riot, trample
When Jasna attacks, regenerate Jasna.
When Jasna deals combat damage to a player, that player sacrifices a nonbasic land or artifact, then returns it to the battlefield face down. It's a basic mountain. If a player sacrifices a permanent in this way, scry 2.

"I will not be stopped from restoring this world."
—Jasna