A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
A player, 22 February 2015
Still looking on present Ivory rulings...
Secluded Outpost Tireless Interrupt, : If this Holding bowed to produce Gold to Recruit a Personality, Equip an attachment to him from your hand for 4 less Gold after he enters play.
Dark Naga Ambusher (You may Equip a Reserve attachment, if it would be opposed, as a Battle action.) Interrupt: After you Equip this Follower, take an additional action.
Tsuruchi Gosho Mantis Clan • Samurai • Scout • Thunder • Naval • Reserve (You may Recruit a Reserve Personality, if he would be opposed, as an Absent Battle action.) Thunder Absent Interrupt: After you Recruit Gosho at this battlefield, Ranged 3 Attack.
Signal the Scouts Invest : Draw a card if the Personality is a Scout. (After this card is played, you may also pay the Invest cost to get the effect, once.) Absent Interrupt: After your action resolves, if it Recruited your Personality during a battle, take an additional action.
Hidden Dagger Ninja Interrupt, w: After each time your action targets an enemy Follower or Personality, give it -2F until after the action resolves.
Assault Unit (You may Equip a Reserve attachment, if it would be opposed, as a Battle action.) Interrupt: After the action Equips this Follower at a battlefield, Fear 3. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I recruit Gosho, I use 2 secluded outposts to pay for him, I attach 2 Dark Naga Skirmishers/ a hidden dagger on him, then I also use signal the scouts.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ string of silly questions
Q1, do I have 3 additional actions after I resolve Gosho's interrupt
Q2, may I attach the naga skirmishers first(or any attachment with a range value or maybe even that nice ninja weapon) then, use them to combine with gosho on his interrupt, Range 3 attack.
Q3, Can I interrupt an interrupt.
Q3.1? if yes, When can I trigger the interrupt of signal the scouts, can it be both before and after his interrupt, or before even the attachments are placed.
Q3.1.1? if yes, can i react the newly attached hidden dagger for Gosho's interrupt range?
Q3.1.1.1? If yes, If an action where to target a card when HIdden Dagger activates, does the said target get -2f per card or yours that says interrupt that specifically targets it before the action resolves. ie:Outpost attaching Hidden Dagger and Assualt unit on gosho, activate Hidden dagger -2, activate Assualt unit fear 3 (minus 2f again from hidden dagger for a total of -4f) then range with gosho. or am I overthinking this, and that you cant suddenly switch the order back and forth of how interrupts resolve, despite both of them being on the stack at the same time.
There are several more questions on this but these would be the most important for now. ( was tinkering with Jemaru and Gosho hence the questions)
Alex Jones (rules official), 23 February 2015
Still looking on present Ivory rulings...
Secluded Outpost Tireless Interrupt, : If this Holding bowed to produce Gold to Recruit a Personality, Equip an attachment to him from your hand for 4 less Gold after he enters play.
Dark Naga Ambusher (You may Equip a Reserve attachment, if it would be opposed, as a Battle action.) Interrupt: After you Equip this Follower, take an additional action.
Tsuruchi Gosho Mantis Clan • Samurai • Scout • Thunder • Naval • Reserve (You may Recruit a Reserve Personality, if he would be opposed, as an Absent Battle action.) Thunder Absent Interrupt: After you Recruit Gosho at this battlefield, Ranged 3 Attack.
Signal the Scouts Invest : Draw a card if the Personality is a Scout. (After this card is played, you may also pay the Invest cost to get the effect, once.) Absent Interrupt: After your action resolves, if it Recruited your Personality during a battle, take an additional action.
Hidden Dagger Ninja Interrupt, w: After each time your action targets an enemy Follower or Personality, give it -2F until after the action resolves.
Assault Unit (You may Equip a Reserve attachment, if it would be opposed, as a Battle action.) Interrupt: After the action Equips this Follower at a battlefield, Fear 3. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I recruit Gosho, I use 2 secluded outposts to pay for him, I attach 2 Dark Naga Skirmishers/ a hidden dagger on him, then I also use signal the scouts.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ string of silly questions
Q1, do I have 3 additional actions after I resolve Gosho's interrupt
Q2, may I attach the naga skirmishers first(or any attachment with a range value or maybe even that nice ninja weapon) then, use them to combine with gosho on his interrupt, Range 3 attack.
Q3, Can I interrupt an interrupt.
Q3.1? if yes, When can I trigger the interrupt of signal the scouts, can it be both before and after his interrupt, or before even the attachments are placed.
Q3.1.1? if yes, can i react the newly attached hidden dagger for Gosho's interrupt range?
Q3.1.1.1? If yes, If an action where to target a card when HIdden Dagger activates, does the said target get -2f per card or yours that says interrupt that specifically targets it before the action resolves. ie:Outpost attaching Hidden Dagger and Assualt unit on gosho, activate Hidden dagger -2, activate Assualt unit fear 3 (minus 2f again from hidden dagger for a total of -4f) then range with gosho. or am I overthinking this, and that you cant suddenly switch the order back and forth of how interrupts resolve, despite both of them being on the stack at the same time.
There are several more questions on this but these would be the most important for now. ( was tinkering with Jemaru and Gosho hence the questions)
The essential problem with your scenarios is: you cannot Interrupt an Interrupt.
Thus, if you're Equipping via Secluded Outpost's Interrupt, you can't Interrupt with the Dark Naga Ambusher or Assault Unit you're putting into play.
Furthermore, even if you put Assault Unit into play via a Battle action, and use its Interrupt, you can't Interrupt *that* action with Hidden Dagger - or anything else - so you're stuck with a Fear 3 which you can't combine, increase with Courage, or make lethal with Okura is Released. However, your opponent can't decrease it with Courage, either, nor negate it with, say, A Stout Heart.
Additional actions, however, do stack. If you play three copies of Signal the Scouts in response to Recruiting Gosho, you will get another 3 actions before your opponent's next opportunity to take an action.