What rules make Phoenix a 'new' unit when revived from trash?

To clarify, there is no specific rule that makes Immortal Phoenix a "new" unit when it is played from the trash. In Riftbound, when a card moves from one zone (like the trash) to another (like the battlefield), it is treated as a new game object.

According to Rule 351.1, "Permanents become Game Objects when Played." When you play Immortal Phoenix from your trash using its triggered ability, it enters the battlefield as a new game object.

Here is how this functions in the game:

1. Zone Change: When a card moves from the trash to the battlefield, it loses its connection to its previous existence on the board. Any "this combat" effects, damage, or status alterations (like being stunned or buffed) that were applied to the Phoenix before it went to the trash do not persist when it is played again.
2. Fresh State: Because it is a new game object, it enters the battlefield with its base stats (3 Might) and no damage marked on it.
3. Triggered Ability: The ability that allows you to play it from the trash is a triggered ability that places the card onto the battlefield. Once it enters, it is a fresh unit.

Important Note on "Responsibility": As noted in the Patch Notes (2026-03-30), the rules regarding Immortal Phoenix were updated to clarify "responsibility" for kill actions. For the Phoenix to trigger, you must be responsible for the kill action, control the spell that instructed it, and the spell itself must have attribution for the kill action.

If you have further questions about how specific interactions work with the Phoenix, feel free to ask!