Cast Ugin's Conjurant, choosing to have X=2, but paying ({0} magic symbol) due to Ezzaroot Channeler.
Bounteous Kirin and Kiri-Onna trigger.
Resolve the Bounteous Kirin trigger, causing you to gain two life.
Resolve the Kiri-Onna trigger, returning it to your hand from the battlefield.
Cast Kiri-Onna by paying two life due to Ezzaroot Channeler and Defiler of Dreams.
Defiler of Dreams triggers, causing you to draw a card.
When Kiri-Onna enters the battlefield, it triggers, returning Ugin's Conjurant to your hand from the battlefield.
Repeat.
Once you have drawn your library, you may cast Ugin's Conjurant with X equaling the amount of life you gained this turn to have it enter the battlefield with a large amount of +1/+1 counters, and to gain that much life due to Bounteous Kirin.