Sheoldred, the Apocalypse is another expensive card that doesnt really need to be here
Commander Commander (CTRL to add secondary) Burn Burn (CTRL to add secondary) Discard Liliana, Waker of the Dead +1: Each player discards a card
The three biggest were the Brothers' War, the Phyrexian Invasion (well, the first one), and the Mending
When paired with cards like Gray Merchant of Asphodel, Exsanguinate, and Blood Tribute, you can rip through an opponents life total in no time
You just need to lock the game down until your opponent is out of cards in their hand, and then slowly chip away at them
One easy way to circumvent this weakness is running High Market so you can sacrifice it at instant speed and prevent it from getting exiled