Not sure if this belongs here, or in the rules forum.
The latter (or possibly Advice); this subforum is for discussion of the Pathfinder 2nd Ed Playtest, and is largely unpopulated now that that's over.
I'm working on a homebrew campaign, using artifact/rare items from across the pathfinder world. Looking at the Apocalypse Box (from Mythic Adventures, I believe), I'm seeing that the cursed creature can open the box only once per day (twice for a mythic character). However the conditions for destroying the box are that the cursed character must first defeat three groups of released monsters in a single day. How is that possible, if the box can only be opened once a day?
Tricky! But the monsters stick around for a week, so if you open the box 1/day for 3 days and get (un)lucky each time, and flee the monsters instead of defeating them, then there'll be three groups of released monsters simultaneously. Teleport around defeating them all within a 24 hour period. Then take your time finding the ancient gold dragon, since that part doesn't appear to have a time limit.