Give Sporeweb Weaver indestructible by any method.
Deal damage to Sporeweb Weaver.
Sporeweb Weaver and Blazing Sunsteel trigger.
Resolve the Sporeweb Weaver trigger, creating a 1/1 green Saproling creature token and gaining you 1 life.
Resolve the Blazing Sunsteel trigger, dealing at least one damage to Sporeweb Weaver.
Repeat from step 3.

Infinite creature tokens

Infinite ETB

Infinite lifegain

Infinite lifegain triggers

Blazing Sunsteel

Sporeweb Weaver

Give Sporeweb Weaver indestructible, if needed.
Activate Goblin Bombardment by sacrificing another creature, dealing 1 damage to Sporeweb Weaver.
Sporeweb Weaver triggers, causing you to gain 1 life and creating a 1/1 Saproling creature token.
Repeat from step 2.

Infinite death triggers

Infinite LTB

Infinite sacrifice triggers

Goblin Bombardment

Give Sporeweb Weaver indestructible, if needed, then cause a creature to enter the battlefield under your control.
Warstorm Surge triggers, dealing damage equal to the creature's power to Sporeweb Weaver.
Sporeweb Weaver triggers, causing you to gain 1 life and creating a 1/1 Saproling creature token.
When the Saproling enters the battlefield, Warstorm Surge triggers, dealing damage equal to the Saproling's power to Sporeweb Weaver.
Repeat from step 3.

Warstorm Surge

Give Sporeweb Weaver indestructible, if needed.
Activate Blasting Station by tapping it and sacrificing another creature, dealing 1 damage to Sporeweb Weaver.
Sporeweb Weaver triggers, causing you to gain 1 life and creating a 1/1 Saproling creature token.
When the Saproling enters the battlefield, Blasting Station triggers, untapping itself.
Repeat from step 2.

Infinite mana creatures you control can produce

Infinite untap of creatures you control

Blasting Station

Give Sporeweb Weaver indestructible, if needed, then cause a creature to enter the battlefield under your control.
Terror of the Peaks triggers, dealing damage equal to the creature's power to Sporeweb Weaver.
Sporeweb Weaver triggers, causing you to gain 1 life and creating a 1/1 Saproling creature token.
When the Saproling enters the battlefield, Terror of the Peaks triggers, dealing damage equal to the Saproling's power to Sporeweb Weaver.
Repeat from step 3.

Terror of the Peaks

Give Sporeweb Weaver indestructible by any method.
Cause a creature to enter the battlefield under your control.
Halana triggers, causing you to pay {2} to have that creature deal damage equal to its power to Sporeweb Weaver.
Sporeweb Weaver triggers, causing you to gain 1 life and create a 1/1 Saproling creature token.
When the Saproling enters the battlefield, Halana triggers.
Holding priority, activate Ashnod's Altar by sacrificing the Saproling, adding {C}{C}.
Resolve the Halana trigger, causing you to pay {2} to deal 1 damage to Sporeweb Weaver.
Repeat from step 4.

Halana, Kessig Ranger

Ashnod's Altar

Give Sporeweb Weaver indestructible, if needed, then cause a creature to enter the battlefield under your control.
Pandemonium triggers, dealing damage equal to the creature's power to Sporeweb Weaver.
Sporeweb Weaver triggers, causing you to gain 1 life and creating a 1/1 Saproling creature token.
When the Saproling enters the battlefield, Pandemonium triggers, dealing damage equal to the Saproling's power to Sporeweb Weaver.
Repeat from step 3.

Pandemonium

Activate Ashnod's Altar by sacrificing Thorin, adding {C}{C}.
When Thorin dies, Nim Deathmantle triggers, causing you to pay {4} to return Thorin from your graveyard to the battlefield and attach Nim Deathmantle to it.
When Thorin enters, it triggers, attaching Nim Deathmantle to Sporeweb Weaver, and then having it deal damage to itself.
Sporeweb Weaver triggers, creating a creature token and causing you to gain 1 life
Activate Ashnod's Altar by sacrificing the creature token, adding {C}{C}.
Repeat.

Combos with "Sporeweb Weaver"