Nykthos, Shrine to Nyx's last ability by paying ({2} magic symbol) and tapping it, adding at least ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Activate any other land by tapping it, adding ({1} 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 land(s) from step 1 and 2.
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 your devotion to blue is at least four, this also produces infinite mana and infinite untap of lands you control.
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.