Terrageddon

A green-white land-destruction midrange deck built on an asymmetric plan: develop your own board aggressively, destroy all lands with Armageddon, then win with the creature that scales with how many lands are in graveyards.

Mox Diamond is the engine: discard a land to play it, tap it for any color. This gives you a turn-one accelerant that helps you cast Armageddon while ahead on the board — and each Mox Diamond feeds Terravore, which gets +1/+1 for each land in all graveyards. A post-Armageddon Terravore is often a 10/10 or larger.

Weathered Wayfarer is the threat against slower decks: whenever an opponent controls more lands than you, search for any land and put it in your hand. After Armageddon, the Wayfarer lets you rebuild while they can’t.

Sylvan Library is filtering and card advantage: look at the top three cards each draw step, keep one for free, pay 4 life each for extras. The deck can absorb life loss because it’s attacking, not defending.

Wasteland handles key nonbasics before Armageddon, disrupting dual lands and Gaea’s Cradles. Rishadan Port taps their lands during their upkeep, preventing them from casting spells on curve.

Call of the Herd provides recurring threats: 3/3 elephant token for three mana, with flashback for another elephant later. Nimble Mongoose is a 1/1 for one with threshold (7+ cards in graveyard) becoming a 3/3 shroud — hard to kill, easy to flip.

The deck preys on any deck leaning on a complex mana base. Weaknesses: the combo decks that win before Armageddon resolves, and any deck with basic-heavy mana (Burn).