Cast Walk the Aeons either from your hand or from your graveyard with buyback by paying ({4} magic symbol) ({U} magic symbol) ({U} magic symbol) and sacrificing three Islands, causing you to take an extra turn after this one and returning Walk the Aeons to your hand.
Play an Island from your graveyard.
Move to your next turn.
Cast Walk the Aeons by paying ({4} magic symbol) ({U} magic symbol) ({U} magic symbol) , causing you to take an extra turn after this one.