Ruthless Technomancer + Urza, Lord High Artificer + Cloudstone Curio Combo

Ruthless Technomancer in hand or on the battlefield.

Urza and Cloudstone Curio on the battlefield.

You control four or more artifacts.

plus up to an additional available

Cast Urza by paying .

When Urza enters the battlefield, it and Cloudstone Curio trigger.

Resolve the Cloudstone Curio trigger, choosing to return Ruthless Technomancer from the battlefield to your hand if its on the battlefield, or nothing otherwise.

Resolve the Urza trigger, creating a 0/0 Construct artifact creature token.

Activate Urza's first ability by tapping the Construct, adding .

Cast Ruthless Technomancer by paying .

When Ruthless Technomancer enters the battlefield, it and Cloudstone Curio trigger.

Resolve the Ruthless Technomancer trigger, causing you to sacrifice the Construct and create a number of Treasure tokens equal to its power.

Holding priority, activate Urza's first ability by tapping a Treasure, adding .

Repeat step 9 until you have total available or until you have one untapped Treasure remaining.

Resolve the Cloudstone Curio trigger, returning Urza from the battlefield to your hand.

Activate a Treasure by tapping and sacrificing it, adding .

Repeat.

Infinite artifact ETB

Infinite artifact LTB

Infinite artifact sacrifice triggers

Infinite artifact tokens

Infinite creature LTB

Infinite creature ETB

Infinite colored mana

Infinite creature sacrifice triggers

Infinite death triggers

Infinite storm count

Exile your library

Infinite Treasure tokens

Cast all spells in your library

Return all creature cards from your graveyard to the battlefield