śrīṣoḍaśīkavacam (Rudra Yamala Tantra)

An armour for Shodashi from the Rudrayamala, asked for by the Goddess and given by Bhairava, who calls it the essence of the Shrividya and names it the armour whose subject is the highest good. Its viniyoga does something the other kavachas do not: instead of naming a syllable as seed and another as power, it uses the three clusters of the fifteen-syllabled vidya itself — ka-e-i-la-hrim for the seed, ha-sa-ka-ha-la-hrim for the power, sa-ka-la-hrim for the pin — so the mantra is set out in the apparatus before the armour begins. Shiva is its seer and the metre is pankti. The meditation that follows is of a form bright as a thousand crores of suns and ornamented all over, which is the gentle Shrividya iconography rather than a fierce one.