Sméagol, Helpful Guide + Dúnedain Rangers + Bloodghast + Phyrexian Altar

Prerequisites

• You don't control a Ring-bearer.
• You have a land card in hand.

Steps

1. 1Play a land card, triggering Dúnedain Rangers and Bloodghast.
2. 2Resolve the Bloodghast trigger, returning it from your graveyard to the battlefield.
3. 3Resolve the Dúnedain Rangers trigger, causing the Ring to tempt you, and causing Bloodghast to become your Ring-bearer.
4. 4Sméagol triggers.
5. 5Holding priority, activate Phyrexian Altar by sacrificing Bloodghast, adding one mana of any color.
6. 6Resolve 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.
7. 7When the land enters the battlefield, Dúnedain Rangers and Bloodghast trigger.
8. 8Repeat from step 2.
9. 9NOTE: 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.

Effects

• Near-infinite colored mana
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite landfall triggers
• Near-infinite LTB
• Near-infinite mill
• Near-infinite sacrifice triggers
• Put all land cards from your opponents' libraries onto the battlefield tapped under your control