You control up to seven lands that can tap to produce at least ({3} magic symbol) ({U} magic symbol) ({R} magic symbol) .
Steps
Activate up to seven lands by tapping them, adding at least ({3} magic symbol) ({U} magic symbol) ({R} magic symbol) .
Activate Saheeli by paying ({U} magic symbol) ({R} magic symbol) and tapping it, creating a token copy of Palinchron with haste.
When the token Palinchron enters the battlefield, it triggers, untapping up to seven lands.
Repeat.
If you control up to seven lands that can tap to produce at least ({4} magic symbol) ({U} magic symbol) ({R} magic symbol) , this combo nets infinite mana, and you may target any other creature(s) or artifact(s) using Saheeli's ability.
Results
Infinite copies of artifacts you control.
Infinite copies of creatures you control with haste.