Activate The Mycosynth Gardens' third ability by paying {2} and tapping it, causing it to become a copy of Blazing Sunsteel.
Activate The Mycosynth Gardens' equip ability by paying {4}, attaching it to the creature that has Blazing Sunsteel attached.
Deal damage to the creature with Blazing Sunsteel and The Mycosynth Gardens attached.
Blazing Sunsteel and The Mycosynth Gardens trigger.
Resolve the Blazing Sunsteel trigger, dealing damage to any target.
Resolve the Mycosynth Gardens trigger, dealing damage to the creature.
Repeat from step 4.

Infinite damage

Blazing Sunsteel

The Mycosynth Gardens

Activate The Mycosynth Gardens' third ability by paying {1} and tapping it, causing it to become a copy of Amulet of Vigor.
Activate Blasting Station by tapping it and sacrificing Unstoppable Slasher.
When Unstoppable Slasher dies, its second ability triggers, returning it from your graveyard to the battlefield with two stun counters on it.
When Unstoppable Slasher enters, Amulet of Vigor, Blasting Station and The Mycosynth Gardens trigger.
Resolve the Blasting Station trigger, untapping it.
Resolve the Amulet of Vigor and Mycosynth Gardens triggers, untapping Unstoppable Slasher twice, which will instead remove both stun counters from Unstoppable Slasher.
Resolve the Blasting Station ability from step 2.
Repeat from step 2.

Infinite creature LTB

Infinite creature ETB

Infinite creature sacrifice triggers

Infinite death triggers

Unstoppable Slasher

Amulet of Vigor

Blasting Station

Activate Krark-Clan Ironworks twice by sacrificing two other lands, adding {C}{C}{C}{C}.
Activate The Mycosynth Gardens' third ability by paying {4} and tapping it, causing it to become a copy of World Shaper.
Activate Krark-Clan Ironworks by sacrificing The Mycosynth Gardens, adding {C}{C}.
The Mycosynth Gardens dies, triggering its second ability, returning all land cards from your graveyard to the battlefield tapped.
The lands enter the battlefield, triggering Amulet of Vigor that many times, untapping the lands.
Repeat.

Infinite colorless mana

Infinite landfall triggers

Infinite colored mana

World Shaper

Mycosynth Lattice

Krark-Clan Ironworks

Activate Krark-Clan Ironworks twice by sacrificing two other lands, adding {C}{C}{C}{C}.
Activate The Mycosynth Gardens' third ability by paying {4} and tapping it, causing it to become a copy of World Shaper.
Activate Krark-Clan Ironworks by sacrificing The Mycosynth Gardens, adding {C}{C}.
The Mycosynth Gardens dies, triggering its second ability, returning all land cards from your graveyard to the battlefield untapped due to Archelos.
Repeat.

Archelos, Lagoon Mystic

Combos with "The Mycosynth Gardens"