User blog comment:Omega natsu2/Chapter 377: The Sky Dragon's Imperial Wrath, Predictions./@comment-94.54.178.118-20140323140511/@comment-7418318-20140323141647

As unlikely as I think this is, I have to point out that Ultear can do a LOT more than just use her crystal orb to attack.

For one thing she's also able to use ice-make magic and seems to be roughly on part with Gray.

And she could use arc of time to move Face's time so far into the future that it cumbles or so back into the past to a time before Face was build, which would split it into it's component parts, effectively destroying it too.

Or she could make the ground beneath Face crumble to dust in a hole deep enought o drop that thing into a magma-flow below, which would surely destroy it too.