Thread:Buddyfight Unified Universe/@comment-26290163-20170620021845/@comment-11372432-20170620135514

They worded it oddly, but it just prevents destruction by effects and nullification by effects. Also, it isn't a semicolon, but a comma and there is another comma after "nullified". The art just made it look different.

So, the phrase is actually this:

"All size 30 or greater monsters on your field cannot be destroyed, and their abilities cannot be nullified, by card effects."

Still an odd way to put it, but it is accurate.