Ask the legend Ivern has an effect 'it can be swapped back when scored'. What does this mean?

The effect "It can be swapped back when scored" on the Brush battlefield token created by Ivern, Green Father refers to your ability to return the original battlefield card to the board.

Here is how this mechanic works, based on the Unleashed update rules:

1. What "Swapping Back" Means

When you play Ivern, Green Father, you replace an existing battlefield with a Brush token. The "swapping back" effect allows you to undo this replacement. When you trigger the swap-back, the Brush token ceases to exist, and the original battlefield card returns to the space the token occupied.

2. How to Trigger It

The trigger condition is "when scored." This means when you successfully perform a "Score" action (either through Hold or Conquer) at the battlefield location where the Brush token is currently present.

• According to Rule 466.2, when you score at a battlefield, any triggered abilities associated with that location resolve.
• When you score at the location of a Brush token, you have the option to trigger its ability to replace itself with the battlefield it originally replaced.

Important Details

• Inheritance: Per the Rules FAQ Clarification 2026-04-29, when the original battlefield returns via a swap-back, it inherits all current effects and statuses (including the relationship between the replaced and replacing battlefields).
• Not Automatic: This is an option ("you may"), not a mandatory action. You choose whether to swap back or keep the Brush token as the battlefield.
• Location Specific: As noted in RiftJudge FAQ #9490, this ability only triggers when you score at the specific battlefield location where the Brush token is located. Scoring at a different battlefield does not allow you to trigger the swap-back for the Brush token.