Jin-Gitaxias, Progress Tyrant + Venser, Shaper Savant + Panharmonicon + Temporal Manipulation

Jin-Gitaxias, Progress Tyrant

Venser, Shaper Savant

Panharmonicon

Temporal Manipulation

How it works

1. Cast Temporal Manipulation by paying 3.
2. Jin-Gitaxias triggers, copying Temporal Manipulation.
3. Holding priority, cast Venser by paying 2.
4. When Venser enters the battlefield, it triggers twice, returning itself and the original Temporal Manipulation to your hand from the battlefield and stack respectively.
5. Resolve the copy of Temporal Manipulation, causing you to take an extra turn after this one.
6. Repeat each turn.

This loop achieves an impenetrable lock and infinite turns by leveraging Panharmonicon to double Venser, Shaper Savant's entry triggers, allowing it to bounce both itself back to your hand and the original Temporal Manipulation off the stack. Meanwhile, Jin-Gitaxias, Progress Tyrant ensures you get a free copied extra turn spell while actively countering the first artifact, instant, or sorcery your opponents attempt to cast each turn. By re-casting Venser and Temporal Manipulation every cycle, you permanently lock your opponents out of playing interactive spells while chaining endless extra turns.