mtg you may play the top card of your library Augur Autumn [Innistrad: Midnight Hunt Prerelease Promos] Nathaniel Himawan | Asgardian Inspiration

This is already a decent card, and its stock can only go up as this archetype becomes more fleshed out

Delirium Whenever this creature attacks for the first time each turn, if there are four or more card types among cards in your graveyard, untap target creature

Thraximundar [Best Table-Wide Sacrifice Pressure and Commander Damage] Thraximundar punishes every opponent by forcing sacrifices while growing into a lethal Zombie threat that ends games through commander damage

This is called the legend rule. Planeswalker cards used to have a slightly different uniqueness rule: 306.4

Its one thing to get a big battlefield advantage for just casting Cathartic Reunion

The eminence ability alone makes it worth while