However, it is possible to upgrade/downgrade a piece multiple times if they are replaced as part of different instructions (e.g., downgrading the same Invader with two different thresholds of
Lost in the Endless Dark) or with two different actions (e.g., different players downgrading pieces in the same land with
Trade Suffers at Terror Level III). Also, the special rule granted by
Serene Waters explicitly allows choosing the same piece twice even if the timing is ambiguous.
Tags: Timing, Upgrade, Downgrade, Replace, 7 more...