Nubchen Sanggyé Yeshé is renowned for having preserved a number of tantric lineages through the so-called “dark period” of Tibetan history (roughly 842-978 CE), when state-supported monastic Buddhism fell into decline. Nubchen authored many works, including the "Lamp for the Eye in Contemplation" ("bsam gtan mig sgron"), an extensive discussion of early Tibetan contemplative systems. But by far his longest work is his little read "Armor Against Darkness" ("mun pa’i go cha"), a systematic commentary on the "Compendium of the Intentions Sūtra". In preparing his commentary, Nubchen studied directly under Chetsenkye and the other translators of the "Compendium Sūtra".