Aetherflux Reservoir + Cloudstone Curio + Defiler of Dreams

Aetherflux Reservoir

Cloudstone Curio

Defiler of Dreams

How it works

1. Cast the blue permanent card in your hand by paying 2 life.
2. Defiler of Dreams and Aetherflux Reservoir triggers.
3. Resolve the Defiler of Dreams trigger, causing you to draw a card.
4. Resolve the Aetherflux Reservoir trigger, causing you to gain 1 life for each spell you've cast before it this turn.
5. The blue permanent enters the battlefield, triggering Cloudstone Curio, returning another nontoken nonartifact blue permanent with mana cost from the battlefield to your hand.
6. Repeat until you have an empty library.
7. Activate Aetherflux Reservoir by paying fifty life, dealing fifty damage to any target.
8. Repeat step 7 as many times as desired.