Cast Kor Skyfisher by paying 0 and 2 life due to Defiler of Faith and Oketra's Monument.
Defiler of Faith and Oketra's Monument trigger.
Resolve the Defiler of Faith trigger, creating a 1/1 Soldier creature token.
When the Soldier enters, Bogwater Lumaret triggers, causing you to gain life.
Resolve the Oketra's Monument trigger, creating a 1/1 Warrior creature token.
When the Warrior enters, Bogwater Lumaret triggers, causing you to gain life.
Resolve Kor Skyfisher. When it enters, it and Bogwater Lumaret trigger.
Resolve the Kor Skyfisher trigger, returning it from the battlefield to your hand.
Resolve the Bogwater Lumaret trigger, causing you to gain life.
Repeat.
This elegant loop turns the white mana reduction of Defiler of Faith and Oketra's Monument into a zero-cost engine, allowing you to cast Kor Skyfisher over and over for free by paying life instead of mana. Each time you cast the Kor, both artifacts/creatures trigger to flood the board with tokens while Bogwater Lumaret cushions your life total with endless lifegain. The Skyfisher's own entry trigger then self-corrects by returning itself right back to your hand, resetting the loop for infinite storm count and creature triggers.