Activate Aetherflux Resevoir by paying 50 life, targeting yourself, but instead preventing the damage and causing you to gain 100 life due to Purity.
Repeat an arbitrarily large number of times.
Activate Aetherflux Resevoir by paying 50 life, dealing 50 damage to any target.
Repeat step 3 as desired.

Infinite damage

Infinite lifegain triggers

Infinite lifegain

Aetherflux Reservoir

Purity

The Wind Crystal

Cast Whitemane Lion by paying {W}.
Spider-Man India triggers, putting a +1/+1 counter on Crystalline Crawler.
When Whitemane Lion enters, it triggers, returning itself from the battlefield to your hand.
Activate Crystalline Crawler by removing a +1/+1 counter from it, adding {W}.
Repeat.

Combos with "The Wind Crystal"