Kill Ondu Spiritdancer.
Myrkul triggers, creating a token copy of Ondu Spiritdancer that is an enchantment.
When the token Ondu Spiridancer enters the battlefield, it and Eidolon of Blossoms trigger.
Resolve the Eidolon of Blossoms trigger, causing you to draw a card.
Resolve the Ondu Spiritdancer trigger, creating a token copy of itself.
Repeat from step 3.

Infinite card draw

Infinite draw triggers

Infinite copies of a specific creature

Myrkul, Lord of Bones

Ondu Spiritdancer

Eidolon of Blossoms

Draw a card.
The Locust God triggers, creating a 1/1 Insect creature token with flying and haste.
The Insect enters the battlefield, triggering Eidolon of Blossoms, causing you to draw a card.
Repeat from step 2.

Near-infinite creature tokens with haste

Near-infinite creature ETB

The Locust God

Enchanted Evening

Draw a card during an opponent's turn.
The Watcher's first ability triggers, creating a 1/1 Tentacle creature token.
When the Tentacle enters the battlefield as an enchantment due to Enchanted Evening, Eidolon of Blossoms triggers, causing you to draw a card.
Repeat from step 2.

Near-infinite creature tokens

The Watcher in the Water

Draw a card.
Nadir Kraken triggers, causing you to pay {1} to put a +1/+1 counter on it and create a 1/1 Tentacle creature token.
The Tentacle enters the battlefield, triggering Eidolon of Blossoms.
Holding priority, activate Ashnod's Altar by sacrificing the Tentacle, adding {C}{C}.
Resolve the Eidolon of Blossoms trigger, causing you to draw a card.
Repeat from step 2.

Near-infinite +1/+1 counters on a creature

Near-infinite colorless mana

Near-infinite death triggers

Near-infinite creature LTB

Near-infinite creature sacrifice triggers

Nadir Kraken

Ashnod's Altar

Draw a card.
Nadir Kraken triggers, causing you to pay {1} to put a +1/+1 counter on it and create a 1/1 Tentacle creature token.
The Tentacle enters the battlefield, triggering Eidolon of Blossoms.
Holding priority, activate Phyrexian Altar by sacrificing the Tentacle, adding {1}.
Resolve the Eidolon of Blossoms trigger, causing you to draw a card.
Repeat from step 2.

Phyrexian Altar

Combos with "Eidolon of Blossoms"