The Motherlode, Excavator 
Legendary Artifact Creature — Robot
When The Motherlode enters, choose target opponent. You get an amount of 
(energy counters) equal to the number of nonbasic lands that player controls.
Whenever The Motherlode attacks, you may pay . When you do, destroy target nonbasic land defending player controls, and creatures that player controls without flying can't block this turn.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL