This effectively doubles your Opus benefits and any Magecraft triggers you have on the board
Sisay, Weatherlight Captain or Kinnan, Bonder Prodigy at the helm, or regularly uses cards like Razaketh, the Foulblooded
On top of that, you get the luxury of manipulating lore counters on your Sagas, which can be very strong depending on the situation
At the very least, this means that you get to draw two cards on your opponents' draw steps
Clayton Kroh (May 21, 2021)
Defender creatures aren't usually worth including in your decks, but Arcades can turn a measly 0/5 into a 5/5 that replaces itself using the abilities from another popular commander in Doran, the Siege Tower, along with drawing extra cards when a defender comes into play