Talk:Fate/Grand Order Fes. 2018 ～3rd Anniversary～/@comment-32929839-20180729100424/@comment-32929839-20180729101900

They arent implemented yet; and the info is fairly vague.. So I'm not sure, but it looks like you can "engrave" a buff onto a specific command card. Using said command card in battle will boost it in various way.

So for example, lets say you habe a QABBB deck. And you engrave the final Buster card. That card, and that card alone, will be granted the buff. Not all three, just that one.

This is my understanding at least.