At the beginning of your upkeep, Endless Ranks of the Dead triggers, creating at least five 2/2 Zombie creature tokens that are artifacts due to Encroaching Mycosynth.
Activate Time Sieve by tapping it and sacrificing five Zombies, causing you to take an extra turn after this one.
Repeat each turn.

Infinite turns

Lock

Time Sieve

Endless Ranks of the Dead

Encroaching Mycosynth

At the beginning of your upkeep, Endless Ranks of the Dead triggers, creating at least five 2/2 Zombie creature tokens that are artifacts due to Biotransference.
Activate Time Sieve by tapping it and sacrificing five Zombies, causing you to take an extra turn after this one.
Repeat each turn.

Biotransference

At the beginning of your upkeep, Endless Ranks of the Dead triggers, creating at least five 2/2 Zombie creature tokens that are artifacts due to Mycosynth Lattice.
Activate Time Sieve by tapping it and sacrificing five Zombies, causing you to take an extra turn after this one.
Repeat each turn.

Mycosynth Lattice

At the beginning of your upkeep, Palace Siege and Endless Ranks of the Dead trigger.
Resolve the Palace Siege trigger, causing each opponent to lose 2 life and you to gain two life.
Resolve the Endless Ranks of the Dead trigger, creating at least one 2/2 Zombie creature token.
Activate Razaketh by paying 2 life and sacrificing a Zombie token, searching your library for Beacon of Tomorrows and putting it into your hand.
Cast Beacon of Tomorrows by paying {6}{U}{U}, causing you to take an extra turn after this one and shuflle Beacon of Tomorrows into your library.
Repeat each turn.

Razaketh, the Foulblooded

Beacon of Tomorrows

Palace Siege

At the beginning of your upkeep, Venser's Journal and Endless Ranks of the Dead trigger.
Resolve the Venser's Journal trigger, causing you to gain at least two life.
Resolve the Endless Ranks of the Dead trigger, creating at least one 2/2 Zombie creature token.
Activate Razaketh by paying 2 life and sacrificing a Zombie token, searching your library for Beacon of Tomorrows and putting it into your hand.
Cast Beacon of Tomorrows by paying {6}{U}{U}, causing you to take an extra turn after this one and shuflle Beacon of Tomorrows into your library.
Repeat each turn.

Venser's Journal

At the beginning of your upkeep, Palace Siege and Endless Ranks of the Dead trigger.
Resolve the Palace Siege trigger, causing each opponent to lose 2 life and you to gain two life.
Resolve the Endless Ranks of the Dead trigger, creating at least one 2/2 Zombie creature token.
Activate Razaketh by paying 2 life and sacrificing a Zombie token, searching your library for Nexus of Fate and putting it into your hand.
Cast Nexus of Fate by paying {5}{U}{U}, causing you to take an extra turn after this one and shuflle Nexus of Fate into your library.
Repeat each turn.

Nexus of Fate

At the beginning of your upkeep, Venser's Journal and Endless Ranks of the Dead trigger.
Resolve the Venser's Journal trigger, causing you to gain at least two life.
Resolve the Endless Ranks of the Dead trigger, creating at least one 2/2 Zombie creature token.
Activate Razaketh by paying 2 life and sacrificing a Zombie token, searching your library for Nexus of Fate and putting it into your hand.
Cast Nexus of Fate by paying {5}{U}{U}, causing you to take an extra turn after this one and shuflle Nexus of Fate into your library.
Repeat each turn.

At the beginning of your upkeep, Endless Ranks of the Dead triggers, creating X copies of Timestream Navigator, where X is half the number of Zombies you control, rounded down.
Activate the oldest Timestream Navigator, paying {2}{U}{U} and putting Timestream Navigator on the bottom of your library to take an extra turn after this one.
Pass the turn.
Repeat.

Combos with "Endless Ranks of the Dead"