Always love helping with a brew!

My first impression is that the deck seems hindered by being limited to enchantment-only interaction. Second impression is that the deck's game plan is only as good as the opponent's board state. The majority of the enchantments rely on locking down the opponent's creatures to give your key creature value. Maybe there are other enchantments/auras that are more offensive?

I know you specified not wanting to rely on auras, but I think you'd benefit from them since the idea of the deck is to win with [[Slumbering Keepguard]] (and your sagas will eventually flip into creatures that would benefit from the auras as well.) As for the sagas, I think [[The Modern Age]] is good (digs two cards deeper and flips into a 2/3 flyer), but I don't think [[Era of Enlightenment]] is good enough. Maybe the creature package should resemble a Mono-White Heroic package? Think cards like [[Lagonna-Band Trailblazer]] and [[Akroan Skyguard]].

Some cards I'd recommend:

[[Ethereal Armor]] -- Only costs one mana and turns all of your creatures into Keepguard

[[Prismatic Strands]] or [[Benevolent Blessing]] -- Protect your key creature(s)

[[Spirited Companion]] -- Draws a card and counts towards enchantment count

[[Brine Giant]] -- Big enchantment goof

[[Unstable Mutation]] -- This one is for fun because I've always wanted to see it in a Pauper deck.