Deep Gnome Terramancer 

Creature — Gnome Wizard
$8.52 #2219 0.28 4.2 years
Flash
Mold Earth — Whenever one or more lands enter under an opponent's control without being played, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle. Do this only once each turn.
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Kor Cartographer80%
$0.12↓#4091↓0.12↓16.9 years↑
"When this creature enters, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle."
Tunnel Ignus80%
$0.55↓#18263↓0.40↑15.9 years↑
"Whenever a land enters under an opponent's control, if that player had another land enter the battlefield under their control this turn, this creature deals 3 damage to that player."
Knight of the White Orchid78%
$0.80↓#644↑0.17↓17.9 years↑
"When this creature enters, if an opponent controls more lands than you, you may search your library for a Plains card, put it onto the battlefield, then shuffle."
Space Marine Scout76%
$0.63↓#10194↓0.353.9 years
"When this creature enters, if an opponent controls more lands than you, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle."
Claim Jumper76%
$0.39↓#18370.15↓2.4 years↓
"When this creature enters, if an opponent controls more lands than you, you may search your library for a Plains card and put it onto the battlefield tapped. Then if an opponent controls more lands than you, repeat this process once. If you search your library this way, shuffle."
Ankh of Mishra75%
$8.84↑#4895↓1.04↑33.1 years↑
"Whenever a land enters, this artifact deals 2 damage to that land's controller."
Confounding Conundrum74%
$0.33↓#8065↓0.295.9 years↑
"Whenever a land an opponent controls enters, if that player had another land enter the battlefield under their control this turn, they return a land they control to its owner's hand."
Archaeomancer's Map72%
$1.03↓#724↑0.235.4 years↑
"Whenever a land an opponent controls enters, if that player controls more lands than you, you may put a land card from your hand onto the battlefield."
Burgeoning72%
$30.62↑#899↑0.99↑28.5 years↑
"Whenever an opponent plays a land, you may put a land card from your hand onto the battlefield."
Keeper of the Accord70%
$0.48↓#1258↑0.245.8 years↑
"At the beginning of each opponent's end step, if that player controls more lands than you, you may search your library for a basic Plains card, put it onto the battlefield tapped, then shuffle."