Many cards that hate on nonbasic lands are good sideboard pieces, but some of them can be played in the main deck depending on the metagame or how well you can break parity on their effects
For a hefty 2 black and 5 generic mana, you get a sorcery that does the following: Destroy all creatures
Battle your way through the plane of Ikoria with monster-themed mechanics that grow your creatures build your bond and crush your opponents Timeless Wisdom Commander (1) Planeswalker (1) Creatures (23) Cryptic Trilobite Savai Thundermane Valiant Rescuer Agitator Ant Nimble Obstructionist Portal Mage Vizier of Tumbling Sands Brallin, Skyshark Rider Curator of Mysteries Surly Badgersaur Akim, the Soaring Wind Mercurial Chemister Psychosis Crawler Rooting Moloch Shabraz, the Skyshark Spellpyre Phoenix Ethereal Forager Isperia, Supreme Judge Niv-Mizzet, the Firemind Sun Titan The Locust God Eternal Dragon Herald of the Forgotten Instants (4) Fierce Guardianship Hieroglyphic Illumination Neutralize Zenith Flare Sorceries (8) Dismantling Wave Windfall Decree of Justice Migratory Route Akroma's Vengeance Boon of the Wish-Giver Descend upon the Sinful Slice and Dice Enchantments (14) Hoofprints of the Stag Lightning Rift Ominous Seas Tectonic Reformation Astral Drift Crystalline Resonance Drake Haven Martial Impetus Psychic Impetus Shiny Impetus Spirit Cairn Cast Out Reconnaissance Mission New Perspectives Artifacts (10) Sol Ring Arcane Signet Azorius Signet Boros Signet Fluctuator Izzet Signet Abandoned Sarcophagus Bonder's Ornament Commander's Sphere Raugrin Crystal Lands (38) Ash Barrens Azorius Chancery Boros Garrison Command Tower Desert of the Fervent Desert of the Mindful Desert of the True Drifting Meadow Exotic Orchard Forgotten Cave Hostile Desert Irrigated Farmland Izzet Boilerworks Lonely Sandbar Myriad Landscape Mystic Monastery Prairie Stream Reliquary Tower Remote Isle Secluded Steppe Shivan Reef Skycloud Expanse Smoldering Crater Temple of the False God Island x5 Mountain x5 Plains x4 Commander, Theme, and Strategy Gavi is all about cycling for the best cost in MTG: zero
Erase One mana, exile any enchantment, the narrowest answer ever
If you want green ramp, you want this
