How does Eclipse mode work in Risk of Rain 2

gamepur.com:

Many rogue-likes, such as Risk of Rain 2, are notorious for having inconsistent difficulty and balancing issues when it comes to their item pickup systems. Some runs may seem all-but-impossible due to lackluster drops, while others will give items which synchronize so well that enemies virtually pose no threat. To prevent this lopsided outcome from happening in Risk of Rain 2, Hopoo Games added the optional Eclipse mode, adding more potential difficulty to subsequent runs.

Eclipse mode is a difficulty setting in Risk of Rain 2 that, in terms of health regeneration rate and pacing of time-scaled difficulty, is identical to Monsoon difficulty. What sets Eclipse apart as the much harder challenge is the series of modifiers that get added with every successful run in a row.

Every time you win in Eclipse mode, a new negative statistic will be added to the next run of the same difficulty. These modifiers stack with each consecutive clear, adding a total of eight modifiers after eight Eclipse wins at its absolute hardest. Upon failing a run at a certain Eclipse level, your tier of difficulty won’t change, meaning that the next run will feature all of the same combined modifiers as the last attempt.

As an added tweak to difficulty, alternative means of successfully clearing a run, such as bringing the Beads of Fealty to the Celestial Portal, do not work in Eclipse mode. Every successful run must end by defeating Mithrix as intended.

Starting the first run at Eclipse level one, all allies, including the player, will start every single stage of the run with at most 50% health. This does not reduce the maximum amount of health a player can have, though it does require them to find healing