Infusion gems
Collect the Poison Gem guarded by Elder Ghrus at Keep Ruins
Poison Gems enable a status-focused infusion and come from Farron Keep enemies, including Ghrus.
WHERE & HOW TO FARM
Collect the Poison Gem guarded by Elder Ghrus at Keep Ruins
Farron Keep: start at Keep Ruins bonfire, exit toward the exterior swamp path, then drop down to the treasure guarded by three Elder Ghrus.
Before you go
- Reach the Keep Ruins bonfire in Farron Keep.
- Bring a weapon and healing suited to fighting three Elder Ghrus in a poison-swamp area.
- Choose a weapon for Poison infusion and verify the scaling change before applying the Gem.
Farming steps
- Rest at Keep Ruins bonfire and orient toward the exterior route that descends to the swamp below.
- Move down to the treasure location outside and below the bonfire; avoid drawing all three guards at once if your build struggles with groups.
- Separate or stagger the Elder Ghrus and clear enough space to reach the corpse safely.
- Loot the fixed Poison Gem from the guarded treasure and confirm it appears in inventory.
- Return to Firelink Shrine and speak with Andre to inspect Poison infusion on the intended weapon.
- Compare the status effect and reduced physical scaling against your build before spending the Gem.
- If you still need more Gems, defeat the nearby eligible Ghrus for chance-based drops and rest to reset them; do not treat those drops as guaranteed.
- The fixed treasure is the reliable named pickup; enemy drops are optional random attempts.
- Poison infusion does not require Andre to receive a coal, according to the item reference.
Repeat, collect and use
The corpse treasure is one-time per playthrough cycle. Eligible Farron Keep enemies can be revisited after resting for chance-based drops, but no fixed amount is guaranteed.
Common mistakes
- Searching for a repeatable Scholar route; use the named treasure and local Elder Ghrus instead.
- Assuming the corpse pickup repeats after resting; only enemies reset for further attempts.
- Applying Poison without checking weapon scaling and buff behavior; review Andre’s infusion preview.
When to stop or switch
Stop after collecting the fixed Gem and decide whether poison suits the build; continue with enemy attempts only if you specifically need another Gem.
Sources & fact checks
What you can get here
Open a guide to find other locations and see what the item is used for.