Activate Chthonian Nightmare by paying {E}{E}{E}, sacrificing Greedy Freebooter and returning Chthonian Nightmare from the battlefield to your hand.
When Greedy Freebooter dies, it triggers, creating a Treasure token and causing you to scry 1.
Resolve the Chthonian Nightmare ability, returning Priest of Gix from your graveyard to the battlefield.
When Priest of Gix enters the battlefield, it triggers, adding {B}{B}{B}.
Activate the Treasure by tapping and sacrificing it, adding {1}.
Cast Chthonian Nightmare by paying {1}{B}.
When Chthonian Nightmare enters the battlefield, it triggers, causing you to get {E}{E}{E}.
Activate Chthonian Nightmare by paying {E}, sacrificing Priest of Gix and returning Chthonian Nightmare from the battlefield to your hand, returning Greedy Freebooter from your graveyard to the battlefield.
Cast Chthonian Nightmare by paying {1}{B}.
When Chthonian Nightmare enters the battlefield, it triggers, causing you to get {E}{E}{E}.
Repeat.

Infinite creature LTB

Infinite creature ETB

Infinite creature sacrifice triggers

Infinite death triggers

Infinite scry 1

Infinite storm count

Infinite energy counters

Chthonian Nightmare

Priest of Gix

Greedy Freebooter

Cast Chthonian Nightmare by paying {1}{B}.
When Chthonian Nightmare enters the battlefield, it triggers, causing you to get {E}{E}{E}.
Activate Chthonian Nightmare by paying an amount of {E}, sacrificing Greedy Freebooter or Shambling Ghast and returning Chthonian Nightmare from the battlefield to your hand.
When Greedy Freebooter or Shambling Ghast dies, it and Pitiless Plunderer trigger, creating two Treasure tokens.
Resolve the Chthonian Nightmare ability, returning either Greedy Freebooter or Shambling Ghast from your graveyard to the battlefield.
Activate the Treasures by tapping and sacrificing them, adding {1}{B}.
Repeat.

Pitiless Plunderer

Shambling Ghast

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.

Jet Medallion

Activate Viscera Seer by sacrificing Greedy Freebooter.
When Greedy Freebooter dies, it and Enduring Renewal trigger.
Resolve the Greedy Freebooter trigger, causing you to scry 1 and create a Treasure token.
Resolve the Enduring Renewal trigger, returning Greedy Freebooter from your graveyard to your hand.
Resolve the Viscera Seer ability, causing you to scry 1.
Activate the Treasure by tapping and sacrificing it, adding {B}.
Cast Greedy Freebooter by paying {B}.
Repeat.

Enduring Renewal

Viscera Seer

Activate Ashnod's Altar by sacrificing Greedy Freebooter, adding {C}{C}.
When Greedy Freebooter dies, it and Rakdos trigger.
Resolve the Greedy Freebooter trigger, creating a Treasure token and causing you to scry 1.
Activate the Treasure by tapping and sacrificing it, adding {B}.
Holding priority, activate Haunted Crossroads by paying {B}, putting Greedy Freebooter from your graveyard onto the top of your library.
Resolve the Rakdos trigger, exiling Greedy Freedbooter from the top of your library with the ability to cast it until your next turn.
Cast Greedy Freebooter from exile by paying {1}.
Repeat.

Infinite colorless mana

Rakdos, the Muscle

Haunted Crossroads

Ashnod's Altar

Activate Relic of Legends's last ability by tapping Grimgrin, adding one mana.
Activate Grimgrin by sacrificing Greedy Freebooter, untapping Grimgrin and putting a +1/+1 counter on it.
When Greedy Freebooter dies, it triggers, causing you to scry 1 and create a Treasure token.
Activate the Treasure token by tapping and sacrificing it, adding one mana.
Activate Havengul Lich by paying {1}, allowing you to cast Greedy Freebooter from your graveyard this turn.
Cast Greedy Freebooter from your graveyard by paying its casting cost.
Repeat.

Infinite +1/+1 counters on a creature

Havengul Lich

Grimgrin, Corpse-Born

Relic of Legends

Activate Chthonian Nightmare by paying {E}{E}{E}, sacrificing Greedy Freebooter and returning Chthonian Nightmare from the battlefield to your hand.
When Greedy Freebooter dies, it triggers, creating a Treasure token and causing you to scry 1.
Resolve the Chthonian Nightmare ability, returning Priest of Urabrask from your graveyard to the battlefield.
When Priest of Urabrask enters the battlefield, it triggers, adding {R}{R}{R}.
Activate Initiates of the Ebon Hand by paying {R}, adding {B}.
Activate the Treasure by tapping and sacrificing it, adding {B}.
Cast Chthonian Nightmare by paying {1}{B}.
When Chthonian Nightmare enters the battlefield, it triggers, causing you to get {E}{E}{E}.
Activate Chthonian Nightmare by paying {E}, sacrificing Priest of Urabrask and returning Chthonian Nightmare from the battlefield to your hand, returning Greedy Freebooter from your graveyard to the battlefield.
Cast Chthonian Nightmare by paying {1}{B}.
When Chthonian Nightmare enters the battlefield, it triggers, causing you to get {E}{E}{E}.
Repeat.

Priest of Urabrask

Initiates of the Ebon Hand

Activate an Equipment's equip ability by paying {0}, attaching it to Greedy Freebooter.
Activate Demonmail Hauberk by sacrificing Greedy Freebooter, targeting Koll.
When Greedy Freebooter dies, it and Koll trigger.
Resolve the Greedy Freebooter trigger, creating a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding {B}.
Resolve the Koll trigger, returning Greedy Freebooter from your graveyard to your hand.
Resolve the Demonmail Hauberk ability, attaching it to Koll.
Cast Greedy Freebooter by paying its mana cost.
Repeat.

Koll, the Forgemaster

Demonmail Hauberk

Puresteel Paladin

Activate an Equipment's equip ability by paying {0}, attaching it to Greedy Freebooter.
Activate Dissection Tools by sacrificing Greedy Freebooter, targeting Koll.
When Greedy Freebooter dies, it and Koll trigger.
Resolve the Greedy Freebooter trigger, creating a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding {B}.
Resolve the Koll trigger, returning Greedy Freebooter from your graveyard to your hand.
Resolve the Dissection Tools ability, attaching it to Koll.
Cast Greedy Freebooter by paying its mana cost.
Repeat.

Combos with "Greedy Freebooter"