That is precisely the case with Erika's Venusaur, with first-edition copies selling for around $195 in NM condition
A bold claim, I know, but lets take a moment to compare Deep Gnome Terramancer to most of whites other mana ramp spells: You dont need to be behind your opponents in land count to trigger this ability There arent any extra mana costs you have to pay for this mana ramp effect (and unlike treasure generators, this ramp is also more permanent) Deep Gnome Terramancer only costs 2 mana, putting it on par with the rate found on many of greens best ramp spells Like Natures Lore and Three Visits, you can fetch nonbasic Plains cards like Jetmirs Garden The condition for this cards effect happens all the time in Commander, and can be found on cards in most decks of any power level your opponents are playing even precons
It's currently banned in all MTG formats, but it's not on any MTG banlist - the card will be back soon
Having a lot of artifacts and mana means a hell of a big turn, and cards that untap your artifacts fit perfectly into this big mana/storm style deck
Being an instant, you can use it as a pseudo Fog by just swapping your creature with whoever is attacking you