User blog comment:Sgxzelr/thinking about 7* zelnite.../@comment-27415321-20160421121322/@comment-24570336-20160421131650

^^^^

This. Just because 7* Zeruiah outclass 7* Zelnite in many ways doesn't mean that you can't use him. Honestly, I don't know what makes limited units special other than being limited time to get, as they'll get outclassed by Omni units in the end anyway. Perhaps you can summon for them if their Omni ever comes out in a future.