I presume the Action to add +1/+1 to each "defending character you control" applies only to the characters in play at the time this Action is taken. If a Conflict Character is added from hand, or a Dynasty Character moved or Charged in after the Action is taken, they would not get the bonus, correct? In other words, the game state is not continually checked for the number of defending characters in play. Is that right? Thank you very much!

You're absolutely right.

Correct.

Except apparently in the case of the Vengeful Berserker. In that case it specifically is rechecking. I believe this is due to the 'till the end of the conflict' wording, but not really sure.

2 hours ago, Bronze said:

Except apparently in the case of the Vengeful Berserker. In that case it specifically is rechecking. I believe this is due to the 'till the end of the conflict' wording, but not really sure.

Vengeful Berserker "rechecks" on its own doubling effect, however it would still have to be a defending character at the time the crab stronghold's ability is used to have that modifier applied, let alone doubled. The doubling effect can only double modifiers actually applied to the Berserker, it doesn't actively seek out and add modifiers to it.

4 hours ago, Bronze said:

Except apparently in the case of the Vengeful Berserker. In that case it specifically is rechecking. I believe this is due to the 'till the end of the conflict' wording, but not really sure.

Nah, it's just the way modifiers work in FFG-land. Unlike in the CCG, you don't have to track when exactly a modifier started to apply to calculate a value.

8 hours ago, Khudzlin said:

Nah, it's just the way modifiers work in FFG-land. Unlike in the CCG, you don't have to track when exactly a modifier started to apply to calculate a value.

I am just having a hard time understanding the difference so I can apply reasoning to other future stuff, even though I understand they work this way. I mean you do have to remember which characters were out when you fired the stronghold in this example when other characters enter later from hand, dynasty cards or outside the battle.

You have to go back in that case and say "hey, you only had those two out when you fired it, not the other two" as you recalculate strength. But in the Berserker case he doubles and then later when you change his stat it doesn't have us remember and just doubles the characters new calculated value. I am just missing what the interaction differences are.

Values are recalculated each time a new modifier is applied. You just have to remember which modifiers are applied to each card.

Quote

Modifiers
Some abilities may ask players to modify values. The game state constantly checks and (if necessary) updates the count of any variable quantity that is being modified.
Any time a new modifier is applied (or removed), the entire quantity is recalculated from the start, considering the unmodified base value and all active modifiers.
• The calculation of a value treats all modifiers as being applied simultaneously. However while performing the calculation, all additive and subtractive modifiers should be calculated before doubling and/or halving modifiers are calculated.
• Fractional values are rounded up after all modifiers have been applied.
• When a value is “set” to a specific number, the set modifier overrides all non-set modifiers (including any new non-set modifiers that are added during the duration of the set value). If multiple set modifiers are in conflict, the most recently applied set modifier takes precedence.
• A quantity cannot be reduced so that it functions with a value below zero: a card cannot have negative icons, political or military skill, glory, traits, cost, or keywords. Negative modifiers that would take a value below zero can be applied, but, after all active modifiers have been applied, any resultant value below zero is treated as zero.