The Tenth Doctor + Doom's Time Platform + Capture of Jingzhou
The Tenth Doctor
Doom's Time Platform
Capture of Jingzhou
Infinite turnsLock
How it works
Declare any creature as an attacker. When you do, Doom's Time Platform triggers, exiling Capture of Jingzhou from your graveyard with two time counters on it.
Activate The Tenth Doctor by paying 7, removing the time counters from Capture of Jingzhou.
Capture of Jingzhou's suspend ability triggers, causing you to cast it without paying its mana cost.
Resolve Capture of Jingzhou, causing you to take an extra turn after this one.