Marius Delphus
Adventurer
I'm not sure specifically what the "warden thing" is, but if it involves using the free action mark during another creature's action, then it seems to me as though it comes down to whether you want to allow "interjection" as I've defined it above. So yeah, possibly house rule territory.
It's like in older editions of Magic: The Gathering (and I'm reaching back to pretty vague memories here, so forgive me if I'm in error), there was a difference between Instant and Interrupt speed, but now everything (except combat damage, as of the most current rules, IIUC) is on the "LIFO stack." I think D&D deserves to have more complex timing than Magic, but I'm not sure how that plays out from a rules or player enjoyment perspective.
It's like in older editions of Magic: The Gathering (and I'm reaching back to pretty vague memories here, so forgive me if I'm in error), there was a difference between Instant and Interrupt speed, but now everything (except combat damage, as of the most current rules, IIUC) is on the "LIFO stack." I think D&D deserves to have more complex timing than Magic, but I'm not sure how that plays out from a rules or player enjoyment perspective.