While there is no maximum deck size, so long as players are still able to shuffle it without help, the minimum number of cards that each deck must have is 60
It now sits at $4.10 at time of writing, after a price rise of 925%
(6/16/2023) If the creature you choose as your Ring-bearer was already your Ring-bearer, that still counts as choosing that creature as your Ring-bearer for the purpose of abilities that trigger "whenever you choose a creature as your Ring-bearer" or abilities that care about which creature was chosen as your Ring-bearer
And if we were getting another version of a 'walker we already had, why not Dack Fayden
And, Resourceful Defense returns from the Streets of New Capenna Commander Decks, as does Damning Verdict, both of which are vital to any strategy involving counters (as the Bant deck in that set was also themed around)
Will Kenrith My guilty pleasure Izzet commander partnered with Rowan Kenrith, Will Kenrith has a pretty strong second ability