The Librarians set up bookshelves around the enchanting table, argue over which enchants are worth it, mine a floor of obsidian, and build a Nether portal.
The Librarians pack up the stronghold base, move west to a quiet plain, dig down to a ravine full of gold and diamonds, and watch the first three players fall.
The Librarians hunt for gold in caves with obsidian floors, dodge skeletons and creepers, and turn the gold into golden apples while all 15 players are still alive.
The Librarians pick through a stronghold library for books and string, craft iron armor back at base, and dig for diamonds while all 15 players are still alive.