Ashling's Command by paying ({3} magic symbol) ({U} magic symbol) ({R} magic symbol) , choosing its fourth mode targeting yourself and then any of the other three modes.
Holding priority, cast
Dualcaster Mage by paying its mana cost.
When
Dualcaster Mage enters, it and
Deadeye Navigator's soulbond ability trgger.
Resolve the
Deadeye Navigator trigger, pairing it and
Dualcaster Mage.
Resolve the
Dualcaster Mage trigger, copying
Ashling's Command.
Resolve the copy of
Ashling's Command, causing you to create two Treasure tokens.
Activate the Treasures by tapping and sacrificing them, adding ({1} magic symbol) ({U} magic symbol) .
Activate
Dualcaster Mage by paying ({1} magic symbol) ({U} magic symbol) , blinking it.
Repeat from step 3.
Results
Infinite creature tokens.
Infinite magecraft triggers.
Infinite card draw for any number of players.
Infinite draw triggers for any number of players.
Infinite token copies of Elementals you control.
Infinite LTB.
Infinite ETB.
Metadata
In 6 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).