Epicenter 
Sorcery
Target player sacrifices a land of their choice. Threshold — Each player sacrifices all lands they control instead if seven or more cards are in your graveyard.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL