Cast Reins of the Vinesteed by paying {3}{G}, attaching it to a Spirit.
Reins of the Vinesteed enters the battlefield, triggering Chishiro, creating a 2/2 Spirit token.
Activate Goblin Bombardment by sacrificing the creature with Reins of the Vinesteed attached.
The creature dies, triggering Reins of the Vinesteed, returning Reins of the Vinesteed from your graveyard to the battlefield attached to a Spirit.
Reins of the Vinesteed enters the battlefield, triggering Chishiro, creating a 2/2 Spirit token.
Resolve the Goblin Bombardment ability, dealing 1 damage to any target.
Repeat from step 3.

Infinite damage

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite creature sacrifice triggers

Chishiro, the Shattered Blade

Reins of the Vinesteed

Goblin Bombardment

Cast Reins of the Vinesteed by paying {3}{G}, enchanting any Human or Soldier you control besides Siona.
Siona triggers, creating a 1/1 Human Soldier creature token.
Activate Altar of Dementia by sacrificing the creature enchanted by Reins of the Vinesteed.
The creature dies, triggering Reins of the Vinesteed, returning Reins of the Vinesteed to the battlefield enchanting the Human Soldier token.
Siona triggers, creating a 1/1 Human Soldier creature token.
Resolve the Altar of Dementia ability, causing target player to mill cards equal to the sacrificed creature's power.
Repeat from step 3.

Infinite mill

Infinite self-mill

Siona, Captain of the Pyleas

Altar of Dementia

Cast Reins of the Vinesteed by paying {3}{G}, attaching it to a Spirit.
Reins of the Vinesteed enters the battlefield, triggering Chishiro, creating a 2/2 Spirit token.
Activate Phyrexian Altar by sacrificing the creature with Reins of the Vinesteed attached, adding one mana of any color.
The creature dies, triggering Reins of the Vinesteed, returning Reins of the Vinesteed from your graveyard to the battlefield attached to a Spirit.
Reins of the Vinesteed enters the battlefield, triggering Chishiro, creating a 2/2 Spirit token.
Repeat from step 3.

Infinite colored mana

Phyrexian Altar

Cast Reins of the Vinesteed by paying {3}{G}, enchanting any Human or Soldier you control besides Siona.
Siona triggers, creating a 1/1 Human Soldier creature token.
Activate Phyrexian Altar by sacrificing the creature enchanted by Reins of the Vinesteed, adding one mana of any color.
The creature dies, triggering Reins of the Vinesteed, returning Reins of the Vinesteed to the battlefield enchanting the Human Soldier token.
Siona triggers, creating a 1/1 Human Soldier creature token.
Repeat from step 3.

Cast Reins of the Vinesteed by paying {3}{G}, attaching it to a Spirit.
Reins of the Vinesteed enters the battlefield, triggering Chishiro, creating a 2/2 Spirit token.
Activate Ashnod's Altar by sacrificing the creature with Reins of the Vinesteed attached, adding {C}{C}.
The creature dies, triggering Reins of the Vinesteed, returning Reins of the Vinesteed from your graveyard to the battlefield attached to a Spirit.
Reins of the Vinesteed enters the battlefield, triggering Chishiro, creating a 2/2 Spirit token.
Repeat from step 3.

Infinite colorless mana

Ashnod's Altar

Cast Reins of the Vinesteed by paying {3}{G}, enchanting any Human or Soldier you control besides Siona.
Siona triggers, creating a 1/1 Human Soldier creature token.
Activate Ashnod's Altar by sacrificing the creature enchanted by Reins of the Vinesteed, adding {C}{C}.
The creature dies, triggering Reins of the Vinesteed, returning Reins of the Vinesteed to the battlefield enchanting the Human Soldier token.
Siona triggers, creating a 1/1 Human Soldier creature token.
Repeat from step 3.

Cast Reins of the Vinesteed by paying {3}{G}, attaching it to a Spirit.
When Reins of the Vinesteed enters the battlefield, Chishiro triggers, creating a 2/2 Spirit creature token.
When the Spirit enters the battlefield, Blasting Station triggers, untapping Blasting Station.
Activate Blasting Station by tapping it and sacrificing the creature with Reins of the Vinesteed attached.
When the creature dies, Reins of the Vinesteed triggers, returning Reins of the Vinesteed from your graveyard to the battlefield attached to a Spirit.
When Reins of the Vinesteed enters the battlefield, Chishiro triggers, creating a 2/2 Spirit creature token.
When the Spirit enters the battlefield, Blasting Station triggers, untapping Blasting Station.
Resolve the Blasting Station ability from step ?, dealing 1 damage to any target.
Repeat from step 4.

Blasting Station

Cast Reins of the Vinesteed by paying {3}{G}, attaching it to a Spirit.
Reins of the Vinesteed enters the battlefield, triggering Chishiro, creating a 2/2 Spirit token.
Activate Altar of Dementia by sacrificing the creature with Reins of the Vinesteed attached.
The creature dies, triggering Reins of the Vinesteed, returning Reins of the Vinesteed from your graveyard to the battlefield attached to a Spirit.
Reins of the Vinesteed enters the battlefield, triggering Chishiro, creating a 2/2 Spirit token.
Resolve the Altar of Dementia ability, causing target player to mill cards equal to the Spirit's power.
Repeat from step 3.

Combos with "Reins of the Vinesteed"