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The Ancient Key in Roblox Abyss is one of the most rewarding items you can earn — but many players miss it entirely because it’s locked behind specific NPC quest chains. Use this guide to get your Ancient Key fast and start unlocking Fish Ruins for gold, Star Shards, and rare loot.
| Detail | Info |
|---|---|
| Item | Ancient Key |
| Purpose | Opens Fish Ruins in Ancient Sands region |
| Source | Grumpy Hank quest chain (4 quests) |
| Key Rewards | Gold (~2,000+), Star Shards, Oxygen Pods |
| Biome | Ancient Sands |
The Ancient Key is a special consumable item used to unlock Fish Ruins — locked mini-structures scattered across the map that contain high-value chests. Inside, you can find gold, Star Shards, Oxygen Pods, and potions. These aren’t random drops; each key must be earned through NPC quests, and keys only work within the biome they were obtained from.
There are 7 Fish Ruins total across Abyss: 2 in the Ocean (Forgotten Deep), 2 in Ancient Sands, and 3 in Spirit Roots. The Ancient Key specifically unlocks the ruins in the Ancient Sands region.
The Ancient Key comes from completing Grumpy Hank’s quest chain in Ancient Sands — not Marcus, as some guides suggest. Marcus is a merchant nearby, but Hank is the one who rewards you with the key. Here’s how to do it:
Hank has 4 quests total. The first three involve catching fish found in Ancient Sands. The final quest is the hardest — it requires catching an Ancient Shark, which is rare and takes patience.
⚠️ Heads up: The Ancient Shark is notoriously hard to find. Farm the Ancient Sands area consistently and it will eventually spawn. Don’t give up early.
Completing all 4 quests rewards you with $38,250, 100 Star Shards, and the Ancient Key.
Prerequisite: You must complete Marcus’s quest line first before Grumpy Hank will offer his quests. Talk to Marcus (located at the archaeological site near the upper section of Ancient Sands) and finish his tasks to unlock Hank’s chain.
Once you have the Ancient Key, using it is straightforward.
Keys are one-time use — each key opens one ruin. Once spent, you’ll need to complete more quests to get another.
Grumpy Hank is located in a building slightly west of Crazy Jeff’s Store in the Ancient Sands biome. Complete Marcus’s quests first, then Hank’s quest chain becomes available.
No. Keys in Abyss are biome-specific. The Ancient Key only works on Fish Ruins located in Ancient Sands.
If you’ve obtained the Crab Scroll and spoken to the Crab NPC, opening all 7 ruins completes his questline. You’ll receive Star Shards, Oxygen Pods, potions, and the exclusive Crab Claw artifact.
Yes, it’s one of the harder fish to catch in Abyss. Stay patient, keep fishing in Ancient Sands, and it will eventually appear. It’s worth the grind for the 100 Star Shards and Ancient Key reward.
