Play Glacial Chasm either from your hand or from your graveyard.
When Glacial Chasm enters the battlefield, its second ability triggers, causing you to sacrifice another land you control.
Play any land from your graveyard.
At the beginning of your next upkeep, Glacial Chasm's cumulative upkeep ability triggers, allowing you to choose not to pay the cost and sacrifice it instead.
Repeat.

Prevent all damage that would be dealt to you

Lock

Glacial Chasm

Song of Creation

Ramunap Excavator

Activate five lands by tapping them, adding at least {5}.
Activate Meloku five times by paying {5} and returning the five lands from the battlefield to your hand, creating five 1/1 Illusion creature tokens.
Activate Phyrexian Altar four times by sacrificing four Illusions, adding {2}{G}{G}.
Cast Journey to the Oracle by paying {2}{G}{G}.
Song of Creation's first ability triggers, causing you to draw two cards.
Resolve Journey to the Oracle, putting at least five lands from your hand onto the battlefield, then causing you to discard a card and Journey to the Oracle to your hand.
Repeat.

Infinite draw triggers

Near-infinite card draw

Near-infinite colored mana

Near-infinite creature tokens

Near-infinite death triggers

Near-infinite creature ETB

Near-infinite landfall triggers

Near-infinite creature LTB

Near-infinite looting

Near-infinite magecraft triggers

Near-infinite creature sacrifice triggers

Near-infinite self-discard triggers

Near-infinite storm count

Jadzi, Oracle of Arcavios // Journey to the Oracle

Meloku the Clouded Mirror

Phyrexian Altar

Cast Psychic Miasma by paying {1}{B}, targeting yourself.
Song of Creation's first ability triggers, causing you to draw a card and then mill two cards and return Dakmor Salvage from your graveyard to your hand.
Resolve Psychic Miasma, discarding Dakmor Salvage and returning Psychic Miasma to your hand.
Bone Miser's second ability triggers, adding {B}{B}.
Repeat.

Combos with "Song of Creation"