Orvar, the All-Form | Spark Double | Clockspinning

Cards

Clockspinning in hand.
Orvar and
Spark Double on the battlefield.
You control an Island that enters the battlefield untapped.
({9} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) available.

Cast
Clockspinning with buyback by paying ({3} magic symbol) ({U} magic symbol) , targeting
Spark Double.
Orvar triggers, creating a token copy of
Spark Double that enters the battlefield as a nonlegendary token copy of
Orvar.
Resolve
Clockspinning, returning it to your hand.
Cast
Clockspinning with buyback by paying ({3} magic symbol) ({U} magic symbol) , targeting
Spark Double.
Orvar and the
Spark Double token trigger, creating two token copies of
Spark Double that enters the battlefield as a nonlegendary 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,
Spark Double and the three
Spark Double 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.