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When you put Dockside into games that drop more mana rocks and other permanents on T1-2, it can make an egregious amount of mana as early as Turn 2
It caused issues for Play Design when balancing for Standard, and it simply does not function in Commander
Packs are priced up to $49.99 and still include free shipping and a magnetic case
Thankfully the non-black decks in the format are much more reasonably priced, with several in the $100 to $200 price range, although just how competitive these decks are remains to be seen
I run four copies in a Modern poison counters deck, where that extra +1/+1 really makes a difference when I attack with a Phyrexian Crusader