Garruk has a name and a mana cost like other permanents, and its type line reads Legendary Planeswalker Garruk
This deck likely also drowns in card draw, so you can make some impressive combat turns, if you should wish thanks to this MTG Aetherdrift Commander precon
We have been seeing Spreading Seas a lot in Azorius Control deck as it is basically a 2-mana cycle card that acts as a 1-time answer against Urzas Saga
Having two commanders allows player to be very flexible when constructing their decks, as they can mix and match strategies to optimize their build
It shows you exactly what type of opening hand people kept and puts everyone but your own in-game knowledge in plain sight of the entire table (and you can hide the fact you may have kept a mediocre opener so they cant judge you, ahem)
Its evocative of the 18th and 19th Century, a time when the areas between civilization were quiet and full of threat