| File:QuillsCommonPickup.png | File:QuillsUncommonPickup.png | File:QuillsRarePickup.png |
| Intact Sentient Core | Exceptional Sentient Core | Flawless Sentient Core |
Sentient Cores are Sentient objects that can be traded in for Standing with The Quills in Cetus. Intact Sentient Cores are dropped by Eidolon Vomvalysts while Exceptional Sentient Cores are dropped by Eidolon Teralysts on the Plains of Eidolon, one for each Synovia that is destroyed. They appear as white and blue orbs that float above the ground, lit up by a blue aura that makes them more visible and marked with icons much like Ayatan Stars. A Flawless Sentient Core is dropped alongside a Brilliant Eidolon Shard upon successfully killing a Teralyst while it is tethered by two fully charged Eidolon Lures; both the Shard and the Flawless Core will be dropped by one of the Lures upon self-destruction, not by the Eidolon itself.
Redeeming these Cores will gain Standing with The Quills and a number of cores is needed as a sacrifice for ranking up. Each Intact grants 
100, each Exceptional grants 500, and each Flawless grants 1,200.