Cast an artifact in your hand by paying {0}.
Teshar triggers, returning Glint Hawk from your graveyard to the battlefield.
When Glint Hawk enters, it triggers, returning another artifact that can be cast for {0} from the battlefield to your hand.
Resolve the artifact spell cast in step 1.
Activate Ashnod's Altar by sacrificing Glint Hawk.
Repeat.

Infinite artifact ETB

Infinite artifact LTB

Infinite creature LTB

Infinite creature ETB

Infinite creature sacrifice triggers

Infinite death triggers

Infinite colorless mana

Infinite storm count

Artifact Castable for {0} that survives

Teshar, Ancestor's Apostle

Ashnod's Altar

Glint Hawk

Cast Glint Hawk by paying {W}.
Mirrodin Besieged triggers, creating a 1/1 Myr artifact creature token.
Activate Phyrexian Altar by sacrificing a Myr, adding {W}.
Glint Hawk enters the battlefield, returning itself to your hand.
Repeat.

Encroaching Mycosynth

Mirrodin Besieged

Phyrexian Altar

Cast Glint Hawk by paying {W}.
When Glint Hawk enters, it triggers. Choose not to return an artifact to your hand, instead sacrificing Glint Hawk.
When Glint Hawk dies, Enduring Renewal and Pitiless Plunderer trigger.
Resolve the Enduring Renewal trigger, returning Glint Hawk from your graveyard to your hand.
Resolve the Pitiless Plunderer trigger, creating a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding {W}.
Repeat.

Infinite artifact sacrifice triggers

Enduring Renewal

Pitiless Plunderer

Cast Glint Hawk without paying its mana cost.
Glint Hawk enters the battlefield, returning itself to your hand.
Repeat.

Mycosynth Lattice

Aluren

Cast Glint Hawk by paying {W}.
Efficient Construction triggers, creating a 1/1 Thopter artifact creature token.
Activate Phyrexian Altar by sacrificing a Thopter, adding {W}.
Glint Hawk enters the battlefield, returning itself to your hand.
Repeat.

Efficient Construction

Activate any number of creatures you control by tapping them, adding at least enough mana to cast Glint Hawk.
Cast Glint Hawk by paying its mana cost.
When Glint Hawk enters the battlefield, it, Clement and Intruder Alarm trigger.
Resolve the Clement trigger, returning nothing to your hand.
Resolve the Glint Hawk trigger, returning the other creature with greater mana value from the battlefield to your hand.
Resolve the Intruder Alarm trigger, untapping all creatures.
Activate any number of creatures you control by tapping them, adding at least enough mana to cast the creature returned to your hand.
Cast the creature by paying its mana cost.
When the creature enters the battlefield, Clement and Intruder Alarm trigger.
Resolve the Clement trigger, returning Glint Hawk from the battlefield to your hand.
Resolve the Intruder Alarm trigger, untapping all creatures.
Repeat.

Infinite mana creatures you control can produce

Infinite untap of creatures

Clement, the Worrywort

Intruder Alarm

Combos with "Glint Hawk"