Orvar, the All-Form | Spark Double | Whim of Volrath

Cards

Cast
Whim of Volrath with buyback by paying ({2} 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
Whim of Volrath, returning it to your hand.
Cast
Whim of Volrath with buyback by paying ({2} magic symbol) ({U} magic symbol) , targeting any Island that enters the battlefield untapped.
Orvar,
Spark Double and the
Spark Double token trigger, creating three token copies of the Island.
Resolve
Whim of Volrath, returning it to your hand.
Activate the Island tokens by tapping them, adding ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Repeat from step 4.
Optionally, you may repeat steps 1 through 3 one additional time to get infinite untapped Island tokens and blue mana.
If you choose to get infinite mana, you can then target any permanent using
Whim of Volrath to get infinite tokens of them.