K'rrik, Son of Yawgmoth | Ayara, First of Locthwain | Cloudstone Curio

(and one other card)

Cast any creature card in your hand with mana cost ({B} magic symbol) by paying 2 life.
Aetherflux Reservoir and
K'rrik trigger.
Resolve the
Aetherflux Reservoir trigger, causing you to gain 1 life for each spell you've cast this turn.
Resolve the
K'rrik trigger, putting a +1/+1 counter on it.
The creature enters the battlefield, triggering
Ayara and
Cloudstone Curio.
Resolve the
Ayara trigger, causing each opponent to lose 1 life and you to gain 1 life.
Resolve the
Cloudstone Curio trigger, returning
Ayara from the battlefield to your hand.
Cast
Ayara by paying 6 life.
Aetherflux Reservoir and
K'rrik trigger.
Resolve the
Aetherflux Reservoir trigger, causing you to gain 1 life for each spell you've cast this turn.
Resolve the
K'rrik trigger, putting a +1/+1 counter on it.
Ayara enters the battlefield, triggering itself and
Cloudstone Curio.
Resolve the
Ayara trigger, causing each opponent to lose 1 life and you to gain 1 life.
Resolve the
Cloudstone Curio trigger, returning the creature with mana cost ({B} magic symbol) from the battlefield to your hand.
Repeat.
Once you have an arbitrarily large lifetotal, you may activate
Aetherflux Reservoir's ability infinite times to deal infinite damage to any target(s).