By turning that high storm count into an army of birds, you can close out games by chipping away at your opponents life as you absorb their responses with your fogs and lifegain
It plays even better in decks that make a lot of permanents, like token decks, and in decks where you can gain a lot of life and manipulate the top cards of your library
Dockside Extortionist specifications: Pros Hugely popular for competitive Commander decks Great source of mana for ramp Low mana cost to play Cons Costs an awful lot of money Might make you some enemies at the table Dockside Extortionist is a pirate that Commander players have a lot of strong feelings about
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Liliana is fantastic, but overall it's a bit under where Elspeth was
Fear not, however, as things are a lot more simple than they seem if new trainers take things one step at a time