In Low OPL, Player 1 performs their beginning of turn sequence, and then begins considering their turn. They then exhaust two runes to play a Travelling Merchant to their base. They realize that, with one card in their hand, they have missed the trigger for their The Loose Cannon from the beginning of their turn. They inform Player 2 of this, and move to correct the game state by taking back the Travelling Merchant action, and then drawing the card for the missed trigger. However, Player 2 does not believe they should be able to do so. A Judge is called to settle the opposing view. Which of the following should happen:

In this scenario, a judge should not allow the rewind.

Here is the breakdown of why this is the case based on the rules and provided context:

1. Missed Triggers vs. Game Errors

According to Rule 702.4 and the provided FAQs regarding missed triggers (FAQ #5809), Player 1 is responsible for their own triggers.

• Missed Triggers: Triggered abilities must be announced when they occur (FAQ #1444). Once Player 1 has proceeded into their Main Phase and performed new game actions (exhausting runes and playing a Traveling Merchant), they have passed the point where the missed trigger can be simply "corrected" or added to the chain.
• The Trigger Check: The ability for Loose Cannon ("At start of your Beginning Phase...") is a triggered ability that occurs at a specific, rigid phase transition. Because Player 1 has moved well past the Beginning Phase into the Main Phase, and performed discretionary actions (exhausting runes, playing a unit), they have advanced the game state significantly.

2. Gameplay Decisions and Communication

According to Tournament Rules Rule 509.3 (Low OPL):

• A player can reverse their most recent action as long as no new action has been taken by either player.
• Because Player 1 has exhausted runes, moved a unit, and performed actions that have changed the game state, they have exceeded the threshold for a rewind under Rule 509.3.

3. Ruling

The judge should rule as follows:

1. Deny the rewind: Player 1 has committed to their current game state by performing actions (channeling/playing) that provide new information and change the game state.
2. Tournament Policy: In high-level OPL, this would be a missed trigger with no remedy (as it was missed in a prior phase). In low OPL, while judges have more discretion, a rewind is only permissible if no new actions have occurred. Since Player 1 has already played a card and altered their hand/rune count, they cannot go back to retroactively trigger an ability that occurred in an earlier phase.
3. Penalties: Player 1 receives a warning for a missed trigger, and play continues from the current state (with the Traveling Merchant remaining on the board). Player 2 is correct that the rewind should not be granted.