I noticed
Eradicate is Modern legal, and thought rather than building specifically around that one card, it would be interesting to try to incorporate it into an existing archetype with a proven track record of performance. More of a side story—a Plan B—than the main focus.
Golgari Midrange was a color match and is also notorious for keeping the pressure on, while not demanding so much of our own attention that we can’t redirect our focus if the opportunity arises. Eradicate had found a home.
The rules text for Eradicate is vaguely unique; instead of searching various locations for ‘cards named X’ it searches for copies of that card. Doesn’t sound like much, but it makes all the difference in the world. If you found a way to turn a land—say, a forest, for instance—into a creature, then Eradicate would allow you to search your opponent’s zones (giggity) for all copies of that card…
But for our Eradicake to rise, we need a special ingredient. We need leaven in the form of Lifespark Spellbomb and/or Genju of the Cedars. Both let us animate lands, which opens the door for Eradication.
•Lifespark Spellbomb is the better option, being able to target any land the opponent has without restriction as well as giving us potential card advantage. It nurtures Tarmogoyf afterward so it’s as valuable in the graveyard as out of it.
•Genju of the Cedars is more finnicky to use, hence why we run Yavimaya, Cradle of Growth. The additional card type will feed our Lhurgoyf, so oftentimes it’s best to let the enchantment rot in the graveyard. But we do retain the option to recall it to hand, which can help when dealing with multicolored decks—especially if Tarmogoyf is M.I.A.
On a final note, it’s worth highlighting that Eradicate does nothing against “copies of that card” that are already in play—it only targets them in the other zones. So if our opponent managed to ramp out a decent number of forests, you may wish to forego the land destruction elements of the deck and focus on a good old fashioned Golgari beat down. However…remember Assassin's Trophy? That does target lands in play. And should your opponent seek to find a replacement (as stipulated by Assassin's Trophy)…well, imagine their embarrassment when they realize they’ve already all been exiled when you cast Eradicate!
Special thanks to wallisface for invaluable input, clarifying a misconception about Eradicate I had been erroneously operating under. The land destruction aspect doesn’t pack quite the all consuming punch I thought it might, but it still technically works—and for a land destruction aficionado like myself I enjoy having the option if the match warrants it.