In the penultimate verse of phalasruthi of Shiva Panchakshara Stotra written by Adi Shankaracharya,
Yajñasvarūpāya {Yakṣasvarūpāya} jaṭādharāya
pinākahastāya sanātanāya ।
divyāya devāya digambarāya
tasmai ya_kārāya namaḥ śivāya ॥5॥
There are two variations Yajna-Svarūpāya and Yaksha-Svarūpāya; which one is likely to be the correct one?