Release to the Wind in exile (exiled by Elite Arcanist).
All permanents on the battlefield.
Creatures you control can tap to produce at least ({1} magic symbol) ({G} magic symbol) .
Elite Arcanist does not have summoning sickness.
({1} magic symbol) available.
Steps
Activate any number of creatures you control by tapping them, adding at least ({1} magic symbol) ({G} magic symbol) .
Activate Elite Arcanist by paying ({3} magic symbol) and tapping it, causing you to cast a copy of Release to the Wind.
Resolve Release to the Wind, exiling Flaxen Intruder and allowing you to cast it from exile without paying its mana cost for as long as it remains exiled.
Cast Welcome Home from exile by paying ({0} magic symbol) , creating three 2/2 Bear creature tokens and exiling Welcome Home.
When the Bears enter the battlefield, Intruder Alarm triggers three times.
Resolve the first trigger, untapping all creatures.
Activate any number of creatures you control by tapping them, adding at least ({1} magic symbol) ({G} magic symbol) .
Repeat steps 6 and 7 two additional times.
Cast Flaxen Intruder from exile by paying ({G} magic symbol) .
When Flaxen Intruder enters the battlefield, Intruder Alarm triggers, untapping all creatures.