Complex sentence: Maldivian learned men, who were all well versed in sorcery, saw the advantages of writing in this simplified hidden script, and Tāna was gradually adopted for everyday use.
Split into simpler sentences: Maldivian learned men, who were all well versed in sorcery, eventually saw the advantages of writing in this simplified hidden script. Hence, with the passing of time, Tāna came out of the shadows and was gradually adopted for everyday use.