Cast Clockspinning with buyback by paying ({3} magic symbol) ({U} magic symbol) , targeting Sakashima of a Thousand Faces.
Orvar triggers, creating a token copy of Sakashima of a Thousand Faces that enters the battlefield as a token copy of Orvar.
Resolve Clockspinning, returning it to your hand.
Cast Clockspinning with buyback by paying ({3} magic symbol) ({U} magic symbol) , targeting Sakashima of a Thousand Faces.
Orvar and the Sakashima of a Thousand Faces token trigger, creating two token copies of Sakashima of a Thousand Faces that enters the battlefield as a token copy of Orvar.
Resolve Clockspinning, returning it to your hand.
Cast Clockspinning with buyback by paying ({3} magic symbol) ({U} magic symbol) , targeting any Island that enters the battlefield untapped.
Orvar, Sakashima of a Thousand Faces and the three Sakashima of a Thousand Faces tokens trigger, creating five token copies of the Island.
Resolve Clockspinning, returning it to your hand.
Activate four of the Island tokens by tapping them, adding ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Repeat from step 7.
Once you have infinite mana, you can then target any permanent using Clockspinning to get infinite tokens of them.