Play a land card.
Dúnedain Rangers and the permanent with a Landfall ability trigger.
Resolve the permanent with a Landfall ability trigger, creating a creature token.
Resolve the Dúnedain Rangers trigger, causing the Ring to tempt you, and causing the creature token to become your Ring-bearer.
Sméagol triggers.
Holding priority, activate Ashnod's Altar by sacrificing the creature token.
Resolve the Sméagol trigger, causing an opponent to reveal cards from the top of their library until they reveal a land card, then causing you to put the land onto the battlefield tapped under your control, and your opponent to put all other revealed cards into their graveyard.
Repeat from step 2.

Near-infinite ETB

Near-infinite landfall triggers

Near-infinite LTB

Near-infinite mill

Near-infinite death triggers

Near-infinite sacrifice triggers

Near-infinite colorless mana

Put all land cards from your opponents' libraries onto the battlefield tapped under your control

Permanent with Landfall Ability: Create Creature Token(s)

Sméagol, Helpful Guide

Dúnedain Rangers

Ashnod's Altar

Play a land card, triggering Dúnedain Rangers and Bloodghast.
Resolve the Bloodghast trigger, returning it from your graveyard to the battlefield.
Resolve the Dúnedain Rangers trigger, causing the Ring to tempt you, and causing Bloodghast to become your Ring-bearer.
Sméagol triggers.
Holding priority, activate Ashnod's Altar by sacrificing Bloodghast, adding {C}{C}.
Resolve the Sméagol trigger, causing an opponent to reveal cards from the top of their library until they reveal a land card, then causing you to put the land onto the battlefield tapped under your control, and your opponent to put all other revealed cards into their graveyard.
When the land enters the battlefield, Dúnedain Rangers and Bloodghast trigger.
Repeat from step 2.
NOTE: This combo can be stopped if an opponent runs out of lands in their library, so it is recommended to alternate opponents in between cycles to maximize the amount of iterations.

Bloodghast

Play a land card, triggering Dúnedain Rangers and Rampaging Baloths.
Resolve the Rampaging Baloths trigger, creating a 4/4 Beast creature token.
Resolve the Dúnedain Rangers trigger, causing the Ring to tempt you, and causing the Beast token to become your Ring-bearer.
Sméagol triggers.
Holding priority, activate Ashnod's Altar by sacrificing the Beast, adding {C}{C}.
Resolve the Sméagol trigger, causing an opponent to reveal cards from the top of their library until they reveal a land card, then causing you to put the land onto the battlefield tapped under your control, and your opponent to put all other revealed cards into their graveyard.
When the land enters the battlefield, Dúnedain Rangers and Rampaging Baloths trigger.
Repeat from step 2.
NOTE: This combo can be stopped if an opponent runs out of lands in their library, so it is recommended to alternate opponents in between cycles to maximize the amount of iterations.

Rampaging Baloths

Play a land card, triggering Dúnedain Rangers and Zendikar's Roil.
Resolve the Zendikar's Roil trigger, creating a 2/2 Elemental creature token.
Resolve the Dúnedain Rangers trigger, causing the Ring to tempt you, and causing the Elemental token to become your Ring-bearer.
Sméagol triggers.
Holding priority, activate Ashnod's Altar by sacrificing the Elemental, adding {C}{C}.
Resolve the Sméagol trigger, causing an opponent to reveal cards from the top of their library until they reveal a land card, then causing you to put the land onto the battlefield tapped under your control, and your opponent to put all other revealed cards into their graveyard.
When the land enters the battlefield, Dúnedain Rangers and Zendikar's Roil trigger.
Repeat from step 2.
NOTE: This combo can be stopped if an opponent runs out of lands in their library, so it is recommended to alternate opponents in between cycles to maximize the amount of iterations.

Zendikar's Roil

Play a land card, triggering Dúnedain Rangers and Greensleeves.
Resolve the Greensleeves trigger, creating a 3/3 Badger creature token.
Resolve the Dúnedain Rangers trigger, causing the Ring to tempt you, and causing the Badger token to become your Ring-bearer.
Sméagol triggers.
Holding priority, activate Ashnod's Altar by sacrificing the Badger, adding {C}{C}.
Resolve the Sméagol trigger, causing an opponent to reveal cards from the top of their library until they reveal a land card, then causing you to put the land onto the battlefield tapped under your control, and your opponent to put all other revealed cards into their graveyard.
When the land enters the battlefield, Dúnedain Rangers and Greensleeves trigger.
Repeat from step 2.
NOTE: This combo can be stopped if an opponent runs out of lands in their library, so it is recommended to alternate opponents in between cycles to maximize the amount of iterations.

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