Cast Mourning by paying 2 life if able, or otherwise.
Each creature you control's extort ability triggers.
Resolve the first extort trigger, causing you to pay 2 life if able, or W/B otherwise, causing each opponent to lose 1 life and you to gain that much life.
Repeat step 3 for each remaining extort trigger.
Resolve Mourning, attaching it to a creature you control.
Activate Mourning by paying 2 life, returning it from the battlefield to your hand.
Repeat until an opponent loses the game due to having 0 or less life.
This wicked loop lets you weaponize the life-paying mechanics of K'rrik, Son of Yawgmoth to drain your opponents into oblivion. Because K'rrik lets you substitute life for black mana costs, you can cast Mourning for zero net mana and bounce it right back to your hand using its own activation cost, which K'rrik also converts to life. Pontiff of Blight grants extort to your board, turning every single casting and bouncing cycle of Mourning into a cascade of life-draining triggers. Even though Inquisitive Glimmer is part of the machinery here, the true engine runs on K'rrik's conversion, looping Mourning endlessly until your foes have no life left to give.