Abstruse -

Originally written in Node.js (v1.x), the current version (v2.0+) is built using Golang .

New Ayleid artifact - Unveiling the Abstruse | Skyrim Creations Abstruse

Recondite, esoteric, arcane, and unfathomable. Originally written in Node

The word is a recurring motif in various digital media, often used to label high-level tiers or mysterious artifacts. Originally written in Node.js (v1.x)