Trap Digger 

Creature — Human Soldier
,
: Put a trap counter on target land you control.
Sacrifice a land with a trap counter on it: This creature deals 3 damage to target attacking creature without flying.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL