Noctis, Prince of Lucis + Aetherflux Reservoir + Solemnity + Lion's Eye Diamond

Noctis, Prince of Lucis

Aetherflux Reservoir

Solemnity

Lion's Eye Diamond

How it works

1. Cast Lion's Eye Diamond from your graveyard by paying 0 and 3 life. It will not enter with a finality counter due to Solemnity.
2. Aetherflux Reservoir triggers, causing you to gain 1 life for each spell you've cast this turn.
3. Resolve Lion's Eye Diamond, and it will not enter with a finality counter due to Solemnity.
4. Activate Lion's Eye Diamond by discarding your hand and sacrificing it, adding three mana of any color.
5. Repeat