Deep Gnome Terramancer is a rare Creature — Gnome Wizard card from The List (PLST), collector number CLB-658. Current market price: $10.35, TCGplayer market prices via Scryfall.
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.