Gitrog, Horror of Zhava

Menace
At the beginning of each combat, if Gitrog, Horror of Zhava is untapped, any opponent may sacrifice a nontoken creature. If they do, tap Gitrog, Horror of Zhava, then seek a land card and put it onto the battlefield tapped.
Whenever a land enters the battlefield under your control, it perpetually gains "{B}{G}, {T}, Sacrifice this land: Draw a card."