Call to Mind in your graveyard, with the other in your hand
Chandra on the battlefield
Capture of Jingzhou in hand
You have not cast an instant or sorcery this turn
({3} magic symbol) ({U} magic symbol) ({U} magic symbol) available on each odd-numbered turn, with at most ({3} magic symbol) ({U} magic symbol) available each even-numbered turn
Steps
Cast
Capture of Jingzhou by paying ({3} magic symbol) ({U} magic symbol) ({U} magic symbol)
Chandra triggers, copying
Capture of Jingzhou
Resolve both
Capture of Jingzhous, 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