Cast any creature by paying its mana cost.
When the creature enters as a Plains due to Ashaya and Emeria Shepherd, Emeria Shepherd triggers.
Holding priority, activate Zuran Orb by sacrificing the creature cast in step 1.
Resolve the Emeria Shepherd trigger, returning another creature from your graveyard to the battlefield.
Repeat from step 2.

Infinite creature LTB

Infinite creature ETB

Infinite creature sacrifice triggers

Infinite death triggers

Infinite lifegain triggers

Infinite lifegain

Infinite landfall triggers

Return all creature cards from your graveyard to the battlefield

Ashaya, Soul of the Wild

Celestial Dawn

Emeria Shepherd

Zuran Orb

Activate Eldrazi Displacer by paying {2}{C}, blinking Famished Foragers.
When Famished Foragers enters the battlefield, it triggers, adding {R}{R}{R} that can only be spent as though it were colorless mana due to Celestial Dawn.
Repeat.

Eldrazi Displacer

Famished Foragers

Activate Eldrazi Displacer by paying {2}{C}, blinking Priest of Urabrask.
When Priest of Urabrask enters the battlefield, it triggers, adding {R}{R}{R} that can only be spent as though it were colorless mana due to Celestial Dawn.
Repeat.

Priest of Urabrask

Activate Eldrazi Displacer by paying {2}{C}, blinking Priest of Gix.
When Priest of Gix enters the battlefield, it triggers, adding {B}{B}{B} that can only be spent as though it were colorless mana due to Celestial Dawn.
Repeat.

Priest of Gix

Activate Eldrazi Displacer by paying {2}{C}, blinking Ardent Electromancer.
When Ardent Electromancer enters the battlefield, it triggers, adding {R}{R}{R}{R} that can only be spent as though it were colorless mana due to Celestial Dawn.
Repeat.

Infinite blinking

Infinite colorless mana

Infinite blinking of most creatures

Ardent Electromancer

Cast Peer into the Abyss by paying {4}{B}{B}{B}, causing you to draw half your library and lose half your life total, rounding up each time.
Activate Vizkopa Guildmage by paying {1}{W}{B}, causing each opponent to lose life whenever you gain life this turn.
Activate Martyr of Sands by paying {1}, revealing all white cards in your hand and sacrificing Martyr of Sands, causing you to gain 3 life for each card revealed this way.
Vizkopa Guildmage triggers, causing each opponent to lose life equal to the amount of life you gained.

Near-infinite lifegain

Near-infinite lifeloss

Peer into the Abyss

Vizkopa Guildmage

Martyr of Sands

Activate Eldrazi Displacer by paying {2}{C}, blinking Mardu Warshrieker.
When Mardu Warshrieker enters the battlefield, it triggers, adding {R}{W}{B}, in which the {R} and {B} can only be spent as colorless mana due to Celestial Dawn.
Repeat.

Combos with "Celestial Dawn"