You have not cast an instant or sorcery this turn.
({3} magic symbol) ({U} magic symbol) ({U} magic symbol) on each odd-numbered turn, with at most ({3} magic symbol) ({U} magic symbol) available each even-numbered turn available.
Steps
Cast
Time Warp by paying ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) , targeting yourself.
Chandra triggers, copying
Time Warp, targeting yourself.
Resolve both
Time Warps, causing you to take two extra turns after this one.
Move to your next turn.
Cast etiher
Mystic Retrieval or
Call to Mind by paying its mana cost, targeting either
Call to Mind or
Mystic Retrieval in your graveyard.
Chandra triggers, copying
Call to Mind or
Mystic Retrieval, targeting
Time Warp.
Resolve both
Call to Minds or
Mystic Retrievals, returning
Time Warp and either
Call to Mind or
Mystic Retrieval from your graveyard to your hand.