If it isn't your turn and you have more cards in your hand than the maximum allowed due to some card effect, do you have to discard down to the maximum immediately, at the current player's discard phase, or at your next discard phase?
For example, I have 8 cards in my hand and my opponent brings out Moshi Mogai (Experienced)*. When do I discard down to 7 cards?
*
Mantis Clan Courtier. Master of Pain. Experienced. Unique. Shadowlands Lose 1 Honor. While you control Mogai, increase your maximum hand size by one and reduce all other players' maximum hand sizes by one. Open: Once per turn, give +2F/+2C to a Personality with 0 Personal Honor other than Mogai. Lose 2 Honor.