Sorry to be a grammar Nazi. Observe, this item from the Lodestone's new grand companies page detailing the 1.18 release info:

Grand Company Seals

Completing a mission will earn you an amount in Grand Company Seals commensurate with the difficulty of your assigned task. Each organization issues its own unique type of seal (see below), which serves as a currency of sorts and can be used to redeem myriad useful items.


Fix last sentence to : ... and can be used to redeem ''for a'' myriad ""of"" useful items.