If you destroy some of your own permanents with Convert to Slime, they'll go to your graveyard in time for their types to be counted for the delirium ability
Torpor Orb | Illustration by Svetlin Velinov Stax cards impede your opponents development through various means , such as forcing them to sacrifice permanents, taxing them, making cards enter tapped, and simply having the text players/opponents cannot do X. Many players believe the term comes from Smokestack, a key card of the original stax list, and to some extent that's true
On top of this, there are a plethora of removal spells like Void Rend and Vindicate, that easily deal with your opponents' best threats
Skullbriar, the Walking Grave has had a weird history with the format
They may be mostly intended as an introduction to Commander for newer inductees to the format, but theyre often just very solid decks