Lilysplash Mentor | Cloud of Faeries | Nykthos, Shrine to Nyx

Cards

Your devotion to blue or green is at least four.
You control at least one additional mana-producing land that can tap to produce at least ({G} magic symbol) or ({U} magic symbol) .

Activate
Nykthos's second ability by paying ({2} magic symbol) and tapping it, adding at least ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) ({G} magic symbol) or ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Activate another mana producing land by tapping it, adding at least ({G} magic symbol) or ({U} magic symbol) .
Activate
Lilysplash Mentor by paying ({1} magic symbol) ({G} magic symbol) ({U} magic symbol) , blinking
Cloud of Faeries.
When
Cloud of Faeries enters the battlefield, it triggers, untapping
Nykthos and another mana-producing land.
Repeat.

If you have at least five devotion to either blue or green, this combo nets infinite blue or green mana, and you may instead untap any other land(s) in place of
Nykthos. If you have at least five devotion to both blue and green, you can forego tapping other land(s) if desired.

This combo has been estimated to be Exhibition (Bracket 1+).