Activate Unnatural Selection by paying {1}, giving Reckless Firweaver the Pirate creature type until end of turn.
Cause an artifact to enter the battlefield under your control.
Reckless Fireweaver triggers, dealing 1 damage to each opponent.
Malcolm triggers, as Reckless Fireweaver is a Pirate due to Unnatural Selection, creating a Treasure token for each opponent dealt damage this way.
When the Treasure(s) enter, Reckless Fireweaver triggers that many times.
Resolve the first Reckless Fireweaver trigger, dealing 1 damage to each opponent.
Repeat from step 4.

Infinite colored mana

Infinite damage

Infinite Treasure tokens

Malcolm, Keen-Eyed Navigator

Unnatural Selection

Reckless Fireweaver

Activate Unnatural Selection by paying {1}, causing Shao Jun to become a Pirate until end of turn.
Activate Shao Jun by tapping two artifacts, dealing 1 damage to each opponent.
Malcolm triggers, creating a Treasure for each opponent dealt damage this way.
Repeat from step 2.

Near-infinite damage

Near-infinite tapped Treasure tokens

Shao Jun

Activate Unnatural Selection by paying {1}, causing Mayhem Devil to become a Pirate until end of turn.
Activate a Treasure token by tapping and sacrificing it, adding one mana of any color.
Mayhem Devil triggers, dealing 1 damage to an opponent.
Malcolm triggers, creating a Treasure token.
Repeat from step 2.

Mayhem Devil

Activate Unnatural Selection by paying {1}, causing Magmaw to become a Pirate until end of turn.
Activate Magmaw by paying {1} and sacrificing another nonland permanent, dealing 1 damage to an opponent.
Malcolm triggers, creating a Treasure, Food and Clue token.
Activate the Treasure by tapping and sacrificing it, adding {1}.
Repeat from step 2.

Infinite Clue tokens

Infinite Food tokens

Magmaw

Academy Manufactor

Activate Unnatural Selection by paying {1}, causing Magmaw to become a Pirate until end of turn.
Activate Magmaw by paying {1} and sacrificing another nonland permanent, dealing 1 damage to an opponent.
Malcolm triggers, creating two Treasure tokens.
Activate a Treasure by tapping and sacrificing it, adding {1}.
Repeat from step 2.

Xorn

Activate Griffin Canyon's first ability by tapping it, adding {C}.
Activate Unnatural Selection by paying {1}, causing Argothian Elder to become a Griffin until end of turn.
Activate Argothian Elder by tapping it, untapping Griffin Canyon and another land.
Activate Griffin Canyon's second ability by tapping it, untapping Argothian Elder and giving it +1/+1 until end of turn.
Repeat from step 3.

Infinite mana lands you control can produce

Infinite untap of lands you control

Infinitely large Argothian Elder until end of turn

Argothian Elder

Griffin Canyon

Activate Unnatural Selection by paying {1}, causing Ley Weaver to become an Elf until end of turn.
Activate a land by tapping it, adding {G}{G}{G} due to Tectonic Split
Activate Ley Weaver by tapping it, untapping Wirewood Lodge and a land
Activate Wirewood Lodge's second ability by paying {G} and tapping it, untapping Ley Weaver.
Repeat from step 2.

Ley Weaver

Wirewood Lodge

Tectonic Split

Activate Unnatural Selection by paying {1}, causing Trazyn to become a Sliver until end of turn.
Activate Trazyn using White Lotus Tile's ability by tapping it, adding at least three mana of any color.
Activate Trazyn by paying {2}, untapping it.
Repeat from step 2.

Infinite untap of Slivers you control

Trazyn the Infinite

Scuttling Sliver

White Lotus Tile

Activate Unnatural Selection by paying {1}, causing North Pole Patrol to become a Dwarf until end of turn.
Activate North Pole Patrol by tapping it, targeting Samut.
Magda triggers, creating a Treasure token.
Resolve the North Pole Patrol ability, untapping Samut.
Activate the Treasure by tapping and sacrificing it, adding {W}.
Activate Samut by paying {W} and tapping it, untapping North Pole Patrol.
Repeat from step 2.

Put all Dragon and artifact cards from your library onto the battlefield

Samut, Voice of Dissent

Magda, Brazen Outlaw

North Pole Patrol

During an opponent's turn, activate Unnatural Selection by paying {1}, causing Wylie Duke to become a Kraken until end of turn.
Activate Heart of Kiran by tapping Wylie Duke.
Wylie Duke triggers, causing you to draw a card and gain 1 life.
The Watcher's first ability triggers, creating a 1/1 Tentacle creature token.
Resolve the Heart of Kiran ability, causing it to become a creature until end of turn.
Activate Shilgengar by sacrificing the Tentacle.
When the Tentacle dies, The Watcher's second ability triggers, untapping Wylie Duke and putting a stun counter on up to one permanent.
Resolve the Shilgengar ability
Repeat from step 2.

Combos with "Unnatural Selection"