You control an additional land that can tap to produce ({U} magic symbol) .
Steps
Activate
Loading...
Azorius Chancery and the additional land by tapping them, adding at least ({1} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Cast
Loading...
Cloud of Faeries by paying ({1} magic symbol) ({U} magic symbol) .
When
Loading...
Cloud of Faeries enters the battlefield, it and
Loading...
Clement trigger.
Resolve the
Loading...
Clement trigger, choosing to return
Loading...
Shrieking Drake from the battlefield to your hand.
Resolve the
Loading...
Cloud of Faeries trigger, untapping the two lands from step 1.
Cast
Loading...
Shrieking Drake by paying ({U} magic symbol) .
When
Loading...
Shrieking Drake enters the battlefield, it and
Loading...
Clement trigger.
Resolve the
Loading...
Shrieking Drake trigger, returning
Loading...
Cloud of Faeries from the battlefield to your hand.
Resolve the
Loading...
Clement trigger, choosing to return nothing.
Repeat.
Notes
If you control a second land that produces two or more mana, this also produces infinite mana.
If you have a creature with mana value 0 that can survive after being cast for 0 mana, you can bounce it each time in step 9 and also cast it infinite times.