Deep within the glittering greenery of the Tlati Rainforest scuttles a creature so fabulous, even a dragonstone would feel underdressed. Meet the Gemstone Crab – Old School’s sparkliest new boss. It rarely deals damage (and then only deals 1 damage at a time), so if your idea of PvM is relaxed combat XP with virtually no risk of getting KO’d by a crab, congratulations – you’ve found your new best mate.

What is it?
The Gemstone Crab is the massive, gem-encrusted cousin of the humble Sand and Rock Crabs – except this one skipped leg day. It technically does fight back, but it mostly hits 0s, so the only real threat is forgetting your pickaxe.
Despite its (extremely polite) aggression, the crab doesn’t have traditional combat stats. Instead, it has a timer bar above its head – a visual representation of how long it’ll stick around before it gets sick of you whacking it.
It’s group content for players who want something fun, social, and sparkly – or for anyone whose combat strategy mainly involves clicking once and scrolling social media for a bit.
How It Works
- The crab spawns randomly across three potential multi-combat locations in the Tlati Rainforest, which means you’ll be doing a bit of cardio to track it down.
- Once enough people have lovingly bonked it into submission for long enough, the crab reconsiders its life choices and burrows away, leaving behind a giant, mineable gem rock. Nature’s piñata.
- Hit rock, get shiny things!
- Only the top 16 players who deal the most damage get to mine the gem rock it leaves behind, and each player can mine a small number of gems.
- Want to keep the bash-and-mine train rolling? Use the small cave nearby to crawl through the undergrowth and follow the crab to its next hiding spot.