I was paying a visit to the WorldBuilding.SE site and found a post that was quite interesting. Now, I will link the post after an answer has been accepted for those who would like to go read it. As always, good luck to all of you!
Look for the prefix, it lives within me; peer to the end, as far as you can see.
Into the darkness, the infix revealed; a volcano perhaps, in a small field.
Viewing the suffix, a thunderous cloud? Not really too sure, an illness is found.
Even apart, afraid you must be; for I always have, my minions with me.