Activate Terra, Magical Adept by paying 4 and tapping it, causing you to exile it and return it to the battlefield as Esper Terra.
As Esper Terra enters the battlefield, choose to have it enter with four lore counters due to its read-ahead ability.
Esper Terra's fourth chapter ability triggers, causing you to add , and then exile Esper Terra and return it to the battlefield as Terra, Magical Adept.
When Terra, Magical Adept enters the battlefield, it triggers, causing you to mill five cards and put up to one enchantment card milled this way into your hand.
Repeat.
This clever loop utilizes Esper Terra's transformational cycle alongside Barbara Wright: History Teacher, whose read-ahead ability is the crucial passive engine that lets Esper Terra immediately enter with four lore counters. This instantly triggers the Saga's final chapter to generate a massive windfall of ten colored mana while exiling and returning the card back to its front face as Terra, Magical Adept. That entry triggers Terra's self-mill ability to help cycle through your deck, after which you can pay its Trance cost to restart the whole sequence. Meanwhile, Barbarian Class sits quietly on the battlefield, ready to passively manipulate any dice rolling you might need while supporting your creatures.