Squandered Resources + Aftermath Analyst + Chthonian Nightmare + Omnath, Locus of Rage

Squandered Resources

Aftermath Analyst

Chthonian Nightmare

Omnath, Locus of Rage

How it works

1. Activate Squandered Resources by sacrificing a land, adding one mana of any color that land could produce.
2. Repeat step 1 until you have at least 4 available and/or you control no other mana-producing lands.
3. Activate Aftermath Analyst by paying 3 and sacrificing it, returning all land cards from your graveyard to the battlefield tapped.
4. When the lands enter the battlefield, Omnath's first ability triggers that many times, creating that many 5/5 Elemental creature tokens.
5. Activate Chthonian Nightmare by paying EE, sacrificing a creature and returning Chthonian Nightmare from the battlefield to your hand.
6. If the sacrificed creature was an Elemental, Omnath's second ability triggers, dealing 3 damage to any target.
7. Resolve the Chthonian Nightmare ability, returning Aftermath Analyst from your graveyard to the battlefield.
8. When Aftermath Analyst enters the battlefield, it triggers, causing you to mill three cards.
9. Cast Chthonian Nightmare by paying 1.
10. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get EEE.
11. Repeat.

This loop is a masterclass in recycling your entire battlefield to generate overwhelming value, anchored by Squandered Resources converting your lands into immediate mana to fund your spells. As those lands hit the graveyard, Aftermath Analyst brings them all crashing back to the battlefield simultaneously, which feeds Omnath, Locus of Rage's landfall ability to flood the board with massive Elemental tokens. You then use Chthonian Nightmare to sacrifice one of those newly minted Elementals, harvesting its energy and triggering Omnath's death ability while returning Aftermath Analyst to hand so you can cast it all over again.