Gitrog, Horror of Zhava

Legendary Creature — Frog Horror6/6

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 under your control, it perpetually gains "{B}{G}, {T}, Sacrifice this land: Draw a card."

Not legal in Commander

View Gitrog, Horror of Zhava on Scryfall