Saheeli's Artistry | Warden of the Eye | Palinchron

Cards

You control up to seven lands that can tap to produce at least ({4} magic symbol) ({U} magic symbol) ({U} magic symbol) .

Activate up to seven lands by tapping them, adding at least ({4} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Cast
Saheeli's Artistry by paying ({4} magic symbol) ({U} magic symbol) ({U} magic symbol) , creating a token copy of
Palinchron that is an artifact.
When the
Palinchron token enters, it triggers, untapping up to seven lands.
Cast
Warden of the Eye by paying its mana cost.
When
Warden of the Eye enters, it triggers, returning
Saheeli's Artistry from your graveyard to your hand.
Activate up to seven lands by tapping them, adding at least ({4} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Cast
Saheeli's Artistry by paying ({4} magic symbol) ({U} magic symbol) ({U} magic symbol) , creating a token copy of
Warden of the Eye and the
Palinchron token.
When the
Warden of the Eye and
Palinchron tokens enter, they trigger.
Resolve the
Warden of the Eye token's trigger, returning
Saheeli's Artistry from your graveyard to your hand.
Resolve the
Palinchron token's trigger, untapping up to seven lands.
Repeat from step 6.

If the seven lands can tap to produce ({5} magic symbol) ({U} magic symbol) ({U} magic symbol) or more, this combo will net infinite mana. So long as you produce an extra ({U} magic symbol) each loop, you can eventually stop copying
Palinchron and copy other creature(s) or artifact(s) instead. You can also create two copies of
Warden of the Eye instead to return other applicable cards to your hand.