Cast Appa by paying {2}{W}{W}.
When Appa enters, its first ability triggers, exiling Restoration Angel with the ability to cast it later from exile.
Cast Restoration Angel from exile by paying {0} and tapping Appa and another creature you control.
Appa's second ability triggers, creating a 1/1 Ally creature token.
When Restoration Angel enters, it triggers, blinking Appa.
Repeat from step 2.

Infinite creature LTB

Infinite creature ETB

Infinite storm count

Infinite tapped creature tokens

Appa, Steadfast Guardian

Hoarding Broodlord

Restoration Angel

At the beginning of your end step, Thassa triggers, blinking Hoarding Broodlord.
When Hoarding Broodlord enters the battlefield, it triggers, searching your library for Nexus of Fate if it's in your library, and exiling it.
Cast Nexus of Fate either from your hand or from exile by paying {5}{U}{U}, causing you to take an extra turn after this one and shuffle Nexus of Fate into your library.
Repeat each turn.

Infinite turns

Lock

Nexus of Fate

Thassa, Deep-Dwelling

Cast All Aboard using the convoke ability from Hoarding Broodlord by tapping Skycoach Conductor.
Displacer Kitten triggers, blinking Skycoach Conductor, which enters prepared.
Resolve All Aboard.
Repeat.

Infinite casts of a specific spell

Infinite magecraft triggers

Infinite blinking of most creatures

Displacer Kitten

Skycoach Conductor // All Aboard

At the beginning of your end step, Conjurer's Closet triggers, blinking Hoarding Broodlord.
When Hoarding Broodlord enters the battlefield, it triggers, searching your library for Nexus of Fate if it's in your library, and exiling it.
Cast Nexus of Fate either from your hand or from exile by paying {5}{U}{U}, causing you to take an extra turn after this one and shuffle Nexus of Fate into your library.
Repeat each turn.

Conjurer's Closet

At the beginning of your end step, Soulherder's second ability triggers, blinking Hoarding Broodlord.
When Hoarding Broodlord enters the battlefield, it and Soulherder's first ability trigger.
Resolve the Soulherder trigger, putting a +1/+1 counter on it.
Resolve the Hoarding Broodlord trigger, searching your library for Nexus of Fate if it's in your library, and exiling it.
Cast Nexus of Fate either from your hand or from exile by paying {5}{U}{U}, causing you to take an extra turn after this one and shuffle Nexus of Fate into your library.
Repeat each turn.

Soulherder

Cast Beacon of Tomorrows either from your hand or from exile by paying {6}{U}{U}, causing you to take an extra turn after this one and shuffle Beacon of Tomorrows into your library.
At the beginning of your end step, Thassa triggers, blinking Hoarding Broodlord.
When Hoarding Broodlord enters the battlefield, it triggers, searching your library for Beacon of Tomorrows and exiling it.
Repeat each turn.

Beacon of Tomorrows

At the beginning of your end step, Teleportation Circle triggers, blinking Hoarding Broodlord.
When Hoarding Broodlord enters the battlefield, it triggers, searching your library for Nexus of Fate if it's in your library, and exiling it.
Cast Nexus of Fate either from your hand or from exile by paying {5}{U}{U}, causing you to take an extra turn after this one and shuffle Nexus of Fate into your library.
Repeat each turn.

Teleportation Circle

Cast Beacon of Tomorrows either from your hand or from exile by paying {6}{U}{U}, causing you to take an extra turn after this one and shuffle Beacon of Tomorrows into your library.
At the beginning of your end step, Conjurer's Closet triggers, blinking Hoarding Broodlord.
When Hoarding Broodlord enters the battlefield, it triggers, searching your library for Beacon of Tomorrows and exiling it.
Repeat each turn.

Cast Beacon of Tomorrows either from your hand or from exile by paying {6}{U}{U}, causing you to take an extra turn after this one and shuffle Beacon of Tomorrows into your library.
At the beginning of your end step, Teleportation Circle triggers, blinking Hoarding Broodlord.
When Hoarding Broodlord enters the battlefield, it triggers, searching your library for Beacon of Tomorrows and exiling it.
Repeat each turn.

Cast Beacon of Tomorrows either from your hand or from exile by paying {6}{U}{U}, causing you to take an extra turn after this one and shuffle Beacon of Tomorrows into your library.
At the beginning of your end step, Soulherder's second ability triggers, blinking Hoarding Broodlord.
When Hoarding Broodlord enters the battlefield, it and Soulherder's first ability trigger.
Resolve the Soulherder trigger, putting a +1/+1 counter on it.
Resolve the Hoarding Broodlord trigger, searching your library for Nexus of Fate and exiling it.
Repeat each turn.

Cast Demonic Tutor using Hoarding Broodlord's convoke ability by tapping creatures you control.
Displacer Kitten triggers, blinking Emeritus of Woe.
When Emeritus of Woe enters, Intruder Alarm triggers, untapping all creatures you control.
Repeat.

Combos with "Hoarding Broodlord"