At the beginning of your end step, you may discard a card. If you do, create a Treasure token and choose ambitious or expedient. If you chose ambitious, seek a card with greater mana value than the discarded card. If you chose expedient, seek a card with lesser mana value than the discarded card.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II — Create a 2/2 white Knight creature token with vigilance.
III — Knights you control get +2/+1 until end of turn.

Starting intensity 1
At the beginning of combat on your turn, you may cast a spell with mana value equal to Jarsyl, Dark Age Scion's intensity from your graveyard without paying its mana cost. If you do, Jarsyl intensifies by 1.

At the beginning of your end step, you may pay . When you do, target artifact card in your graveyard perpetually gains "This spell costs less to cast." If it's a creature or Vehicle card, it perpetually gets +2/+2. Put it into your library second from the top.

When Kayla's Kindling enters, it deals 2 damage to any target.
At the beginning of your upkeep, draft a card from Kayla's Kindling's spellbook and exile it. Until end of turn, you may cast that card.

Prototype — 3/2
At the beginning of your upkeep, return target creature card with power less than this creature's power from your graveyard to the battlefield. Its base power perpetually becomes equal to this creature's power.