Tap Blasting Station, sacrificing Memnite to deal 1 damage to any target.
Colfenor triggers, returning Ornithopter from your graveyard to your hand.
Cast Ornithopter.
Ornithopter enters, triggering Blasting Station untapping it.
Tap Blasting Station, sacrificing Ornithopter to deal 1 damage to any target.
Colfenor triggers, returning Memnite from your graveyard to your hand.
Cast Memnite.
Memnite enters, triggering Blasting Station untapping it.
Repeat.

Infinite damage

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite creature sacrifice triggers

Infinite storm count

Colfenor, the Last Yew

Tempered Steel

Memnite

Ornithopter

Blasting Station

Cast Underworld Breach.
Activate Altar of Dementia by sacrificing Memnite, milling yourself for three.
Cast Memnite by exiling three cards from your graveyard that are not Thassa's Oracle.
Repeat steps 2 and 3 until you have no cards in library.
Cast Thassa's Oracle.
Resolve its enter the battlefield trigger.

Infinite self-mill

Near-infinite creature ETB

Near-infinite creature LTB

Near-infinite creature sacrifice triggers

Win the game

Altar of Dementia

Underworld Breach

Thassa's Oracle

Combos with "Tempered Steel"