Senior's list of rarely used words in Covenant include "anodyne," " roborant ," "attar," "carious, "bedizened," and "verdigris" (25), to which we could add words like "visage," "mien," "expostulation," "incarnadine," and "ichor." Many other more familiar words are used in unfamiliar ways; throughout the series, the word "despite" frequently appears in its archaic sense as a noun form of "despise" to refer to contempt, disdain, or hatred.

In 1990, it released another hit Lingzhi mushroom roborant of Yeongbicheon.