Omnath, Locus of AllOmnath, Locus of All is also reasonably popular, but I hate what they did to my Elemental, so I'm only going to mention the card
Of course, the card effect also bans cards in-game
Secret Lair x FINAL FANTASY: Weapons: Featuring legendary weapons like Clouds Buster Sword, designed for both engaging gameplay and rich story depth
It has already made a mark in formats like Modern, Legacy, and even Timeless, where fast artifact shells give it plenty of chances to snowball and turn simple plays into lasting advantage
Stegron the Dinosaur Man and Double Trouble can increase the cards power even further, though this only lasts until the end of the players turn
If you're using Sword of Hearth and Home, you can also flicker your Knight for yet another land if someone else is ramping hard