Nephalia Smuggler does not have summoning sickness.
You control up to seven lands that can tap to produce at least ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Steps
Activate up to seven lands by tapping them, adding at least ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Activate Nephalia Smuggler by paying ({3} magic symbol) ({U} magic symbol) and tapping it, blinking Great Whale.
When Great Whale enters the battlefield, it triggers, untapping up to seven lands.
Activate Pemmin's Aura's first ability by paying ({U} magic symbol) , untapping Nephalia Smuggler.
Repeat.
If you control up to seven lands that can tap to produce at least ({4} magic symbol) ({U} magic symbol) ({U} magic symbol) , this combo nets infinite mana.