Activate Origin Spellbomb by paying {1}, tapping and sacrificing it, creating a 1/1 Myr artifact creature token.
Origin Spellbomb leaves the battlefield; choose not to pay for its trigger to draw a card.
Activate Krark-Clan Ironworks by sacrificing the Myr, adding {C}{C}.
The Myr dies, triggering Salvaging Station, untapping Salvaging Station.
Activate Salvaging Station by tapping it, returning Origin Spellbomb from your graveyard to the battlefield.
Repeat.

Infinite colorless mana

Infinite death triggers

Infinite ETB

Infinite LTB

Infinite sacrifice triggers

Origin Spellbomb

Salvaging Station

Krark-Clan Ironworks

Activate Origin Spellbomb by paying {1}, tapping and sacrificing it, creating a 1/1 Myr artifact creature token.
Origin Spellbomb leaves the battlefield; choose not to pay for its trigger to draw a card.
Activate Ashnod's Altar by sacrificing the Myr, adding {C}{C}.
The Myr dies, triggering Salvaging Station, untapping Salvaging Station.
Activate Salvaging Station by tapping it, returning Origin Spellbomb from your graveyard to the battlefield.
Repeat.

Ashnod's Altar

Activate Origin Spellbomb by paying {1}, tapping and sacrificing it, creating a 1/1 Myr artifact creature token.
Origin Spellbomb leaves the battlefield; choose not to pay for its trigger to draw a card.
Activate Phyrexian Altar by sacrificing the Myr, adding {1}.
The Myr dies, triggering Salvaging Station, untapping Salvaging Station.
Activate Salvaging Station by tapping it, returning Origin Spellbomb from your graveyard to the battlefield.
Repeat.

Combos with "Origin Spellbomb"