Tradewind Rider | Intruder Alarm | Ardent Electromancer

Cards

Ardent Electromancer in hand.
Tradewind Rider and
Intruder Alarm on the battlefield (
Tradewind Rider without summoning sickness).

Cast
Ardent Electromancer by paying ({2} magic symbol) ({R} magic symbol) .
When
Ardent Electromancer enters the battlefield, it and
Intruder Alarm trigger.
Resolve the
Ardent Electromancer trigger, adding at least ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Resolve the
Intruder Alarm trigger, untapping all creatures.
Activate
Tradewind Rider by tapping it,
Ardent Electromancer and one other creature you control, returning
Ardent Electromancer from the battlefield to your hand.
Repeat.

If you control creature(s) that can tap to produce mana, you can use that mana to pay for the creature and instead gain mana from the creature's ETB ability.