Activate Burdened Aerialist by paying {1}{U}, blinking it.
When Burdened Aerialist enters, it and Deadeye Navigator's soulbond ability trigger twice.
Resolve both Deadeye Navigator triggers, repairing it and Burdened Aerialist.
Resolve both Burdened Aerialist triggers, creating two Treasure tokens.
Activate both Treasures by tapping and sacrificing them, adding {1}{U}.
Repeat.

Infinite artifact ETB

Infinite artifact LTB

Infinite artifact sacrifice triggers

Infinite creature LTB

Infinite creature ETB

Deadeye Navigator

Burdened Aerialist

Panharmonicon

Activate Burdened Aerialist by paying {1}{U}, blinking it.
When Burdened Aerialist enters, it and Deadeye Navigator's soulbond ability trigger
Resolve the Deadeye Navigator trigger, repairing it and Burdened Aerialist.
Resolve the Burdened Aerialist trigger, creating two Treasure tokens.
Activate both Treasures by tapping and sacrificing them, adding {1}{U}.
Repeat.

Xorn

Activate Ashnod's Altar by sacrificing Burdened Aerialist, adding {C}{C}.
Burdened Aerialist dies, triggering Nim Deathmantle, causing you to pay {4} to return Burdened Aerialist from your graveyard to the battlefield, and attach Nim Deathmantle to it.
Burdened Aerialist enters the battlefield, creating two Treasure tokens.
Activate two Treasure tokens by tapping and sacrificing those, adding two mana of any color.
Repeat.

Infinite death triggers

Infinite creature sacrifice triggers

Nim Deathmantle

Ashnod's Altar

Activate Emiel the Blessed by paying {1}, blinking Burdened Aerialist.
When Burdened Aerialist enters the battlefield, it triggers, creating a Treasure artifact token.
Activate the Treasure by tapping and sacrificing it, adding {1}.
Repeat.

Emiel the Blessed

Training Grounds

Activate Emiel the Blessed by paying {3}, blinking Burdened Aerialist.
When Burdened Aerialist enters the battlefield, it triggers once, and Preston triggers twice.
Resolve the Burdened Aerialist trigger, creating a Treasure token.
Resolve the first Preston trigger, creating a token copy of Burdened Aerialist that is a 0/1 Illusion.
When the Burdened Aerialist token enters the battlefield, it triggers, creating a Treasure token.
Repeat from step 4 for the remaining Preston trigger.
Activate three Treasures by tapping and sacrificing them, adding {3}.
Repeat.

Combos with "Burdened Aerialist"