Chthonian Nightmare + Greedy Freebooter + Shambling Ghast + The Darkness Crystal
Other: Infinite LTB, Infinite ETB, Infinite sacrifice triggers, Infinite death triggers, Infinite scry 1, Infinite storm count, Infinite energy counters
Cast Chthonian Nightmare by paying {B}.
When Chthonian Nightmare enters the battlefield, it triggers, causing you to get {E}{E}{E}.
Activate Chthonian Nightmare by paying {E}, sacrificing Greedy Freebooter and returning Chthonian Nightmare from the battlefield to your hand.
When Greedy Freebooter dies, it triggers, causing you to scry 1 and create a Treasure token.
Resolve the Chthonian Nightmare ability, returning Shambling Ghast from your graveyard to the battlefield.
Activate the Treasure by tapping and sacrificing it, adding {B}.
Cast Chthonian Nightmare by paying {B}.
When Chthonian Nightmare enters the battlefield, it triggers, causing you to get {E}{E}{E}.
Activate Chthonian Nightmare by paying {E}, sacrificing Shambling Ghast and returning Chthonian Nightmare from the battlefield to your hand.
When Shambling Ghast dies, it triggers, creating a Treasure token.
Resolve the Chthonian Nightmare ability, returning Greedy Freebooter from your graveyard to the battlefield.
Activate the Treasure by tapping and sacrificing it, adding {B}.
Repeat.
Cards: Chthonian Nightmare, Greedy Freebooter, Shambling Ghast, The Darkness Crystal
