You control at least one additional creature with power two or greater.
You have not cast an instant or sorcery this turn.
({4} magic symbol) ({U} magic symbol) ({U} magic symbol) on the first turn, with at most ({7} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) available each other extra turn available.
Steps
Cast Walk the Aeons by paying ({4} magic symbol) ({U} magic symbol) ({U} magic symbol) and sacrificing a creaature with power two or greater, targeting yourself.
Walk the Aeons's casualty ability and Talrand trigger.
Resolve the Walk the Aeons trigger, copying it, targeting yourself.
Resolve the Talrand trigger, creating a 2/2 Drake creature token.
Resolve both Walk the Aeonss, causing you to take two extra turns after this one.
Move to your last extra turn.
Cast Call to Mind by paying ({2} magic symbol) ({U} magic symbol) and sacrificing a Drake, targeting Mystic Retrieval.
Call to Mind's casualty ability and Talrand trigger.
Resolve the Call to Mind trigger, copying it, targeting Walk the Aeons.
Resolve the Talrand trigger, creating a 2/2 Drake creature token.
Resolve both Call to Minds, returning Walk the Aeons and Mystic Retrieval from your graveyard to your hand.
Repeat steps 1 through 6 one additional time.
Cast Mystic Retrieval by paying ({3} magic symbol) ({U} magic symbol) and sacrificing a Drake, targeting Call to Mind.
Mystic Retrieval's casualty ability and Talrand trigger.
Resolve the Mystic Retrieval trigger, copying it, targeting Walk the Aeons.
Resolve the Talrand trigger, creating a 2/2 Drake creature token.
Resolve both Mystic Retrievals, returning Walk the Aeons and Call to Mind from your graveyard to your hand.
Repeat steps 1 through 6 one additional time.
Repeat from step 7.
Results
Infinite turns.
2 Instant/Sorcery with "Return Instant/Sorcery from GY to hand".