Mystery box - OSRS Wiki
Mystery boxes can be obtained from the Quiz Master random event. Players can choose between 1,000 coins or the mystery box upon successfully completing the event. Multiple Mystery Boxes can be owned at once, and they can be banked.
Seed box - OSRS Wiki, Seed Box
Quiz Master - OSRS Wiki
Present - OSRS Wiki
Treasure Trails/Guide/Puzzle boxes - OSRS Wiki
Casket - OSRS Wiki
Secret Lair Official Online Store
Flyer - OSRS Wiki
OSRS - Loot from 46 Mystery Boxes
Passageway of the Ancients on Steam
The Old School Wiki invites you on a scavenger hunt! This image contains the most obscure combined inventory of items we could think of! : r/2007scape
Beekeeper's gloves - OSRS Wiki