Cast Greenbelt Ramager by paying {E} if able, or {G} otherwise.
When Greenbelt Ramager enters the battlefield, it triggers, returning it from the battlefield to your hand, and causing you to get {E}.
Repeat.

Infinite ETB

Infinite LTB

Infinite storm count

Greenbelt Rampager

Primal Prayers

Cast Shrieking Drake by paying {E} due to Primal Prayers, if able, or by paying its mana cost.
When Shrieking Drake enters the battlefield, it and Decoction Module trigger.
Resolve the Decoction Module trigger, causing you to get {E}.
Resolve the Shrieking Drake trigger, returning it from the battlefield to your hand.
Repeat.

Decoction Module

Shrieking Drake

Cast Shrieking Drake by paying {E} due to Primal Prayers, if able, or by paying its mana cost.
When Shrieking Drake enters the battlefield, it and Guide of Souls trigger.
Resolve the Guide of Souls trigger, causing you to get {E} and gain 1 life.
Resolve the Shrieking Drake trigger, returning it from the battlefield to your hand.
Repeat.

Infinite lifegain triggers

Infinite lifegain

Guide of Souls

Cast Shrieking Drake by paying {E} due to Primal Prayers, if able, or by paying its mana cost.
When Shrieking Drake enters the battlefield, it and Aetherstorm Roc trigger.
Resolve the Aetherstorm Roc trigger, causing you to get {E}.
Resolve the Shrieking Drake trigger, returning it from the battlefield to your hand.
Repeat.

Aetherstorm Roc

Cast the creature that causes you to get energy counter(s) when it enters the battlefield by paying {E} due to Primal Prayers.
When the creature enters the battlefield, it triggers, causing you to get at least {E}.
Activate Altar of Dementia by sacrificing the creature.
When the creature dies, Enduring Renewal triggers, returning the creature from your graveyard to your hand.
Resolve the Altar of Dementia ability, causing target player to mill cards equal to the creature's power.
Repeat.

Infinite death triggers

Infinite mill

Infinite sacrifice triggers

Infinite self-mill

Creature with MV<=3 that has "When ~ enters, you get at least {E}"

Enduring Renewal

Altar of Dementia

Activate Ayula's Influence by discarding a land card.
Slogurk triggers, putting a +1/+1 counter on it.
Resolve the Ayula's Influence ability, creating a 2/2 Bear creature token.
When the Bear enters, Decoction Module triggers, causing you to get {E}.
Repeat from step 1 two additional times.
Activate Slogurk by removing three +1/+1 counters from it, returning it from the battlefield to your hand.
When Slogurk leaves the battlefield, it triggers, returning three land cards from your graveyard to your hand.
Cast Slogurk by paying {E} due to Primal Prayers.
When Slogurk enters, Decoction Module triggers, causing you to get {E}.
Repeat.

Combos with "Primal Prayers"