So in this case, if you have four Stormbreakers already, then you only need to pay one mana to go infinite, since Sprout Swarm creates a token, and you'll get four new Stormbreakers from the first casting
The card is also an artifact enabling other potential synergies in the Tinker/Welder camp
The rogues deck, dubbed Sneak Attack, has a subtheme of milling opponents with the addition of cards like mill all-star and classic Oona, Queen of the Fae
After all, unlike in 60-card formats where you are trying to deal 20 damage to just one opponent, in Commander, you have to deal with three opposing players, all starting at 40 life and all acting in their best interests
Most of the time players will let you draw a card, but that means you have the potential to draw up to three cards a turn with Missy
Not the most powerful or well supported of Magics creature types, but theres lots of individual bears that can fit your needs in other deck themes