In X-Men Apocalypse, Apocalypse permanently enhances any mutant he chooses.
In order of appearance Apocalypse increases the powers of
By all accounts every one of them seems to keep their enhanced power, but what drew me to this question is that Storm, Psylocke and a short lived Angel seem to keep their powers.
Now this is where I get a little fuzzy, does Charles Xavier have his powers increased permanently and does Magneto have his powers increased permanently?
Being that X-Men is now on a different timeline, it is very much possible that Charles will now not need to use Cerebro to locate and contact anyone all over the world. But from what I can see, Charles did not have his powers permanently enhanced. Because if he did, he may have been able to overpower Apocalypse and that is obviously not what Apocalypse had in mind, so he seems to have only increased his powers for conveying the message to the world.
That leaves Eric (Magneto), after Apocalypse increases his power he is able to literally move dirt because of all the minor traces of metal residing within in it, which would make him far more powerful than anything we have seen from Magneto thus far.
But the question is, did Magneto keep this power?
Any answer correcting my summation of the the above events, as well as clarifying what actually happened will obviously be accepted, as I am not confident that I actually have everything correct in my question. This is just my take on what happened.