Activate Terra, Magical Adept by paying 4 and tapping it, exiling it and returning it to the battlefield as Esper Terra.
When Esper Terra enters the battlefield with four lore counters on it due to Vorinclex and Doc Samson, its 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 return up to one enchantment card from among them from your graveyard to your hand.
Repeat.
This mesmerizing loop centers around Terra, Magical Adept, whose Trance ability transforms her into the Saga Esper Terra—a canvas primed for amplification. Because Vorinclex, Monstrous Raider doubles any counters placed on your permanents while Doc Samson, Super Psychiatrist adds an extra counter on top of that, Esper Terra enters with all four lore counters at once, immediately triggering its final chapter. That explosive climax yields a massive surge of five-color mana while exiling Esper Terra and returning her back to her front face as Terra, Magical Adept, whose entry triggers a mill of five cards to cycle through your deck. By looping this transformation, you continuously cycle through Terra's creature form and her Saga side, feeding on the compounding power of Vorinclex and Doc Samson to generate infinite mana, self-mill, and enter-the-battlefield triggers.