Narset's Reversal and Capture of Jingzhou in hand.
({3} magic symbol) plus six.
({U} magic symbol) each turn available.
Steps
Cast Capture of Jingzhou by paying ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Holding priority, cast Narset's Reversal, choosing to pay its replicate cost once, by paying a total of ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) , targeting Capture of Jingzhou.
Narset's Reversal's replicate ability triggers, creating a copy of it targeting the original Narset's Reversal.
Resolve the copy of Narset's Reversal, creating a copy of the original Narset's Reversal targeting Capture of Jingzhou and returning the original Narset's Reversal to your hand.
Resolve the second copy of Narset's Reversal, creating a copy of Capture of Jingzhou and returning the original Capture of Jingzhou to your hand.
Resolve the copy of Capture of Jingzhou, causing you to take an extra turn after this one.