I think that's the beauty of that power, there are so many ways to describe it. It could be hot air, a fireball, dragons breath, a blizzard, acid, plasma... hot soup! It only mentions controlling the energy, and basic protect specifies it only protects against energy attacks but that's what the upgrade is for.
Ensnare 2 could be vines growing up out of the ground, it could be Ice freezing the target, it could be an invisible barrier, or many other options. Burn could be from fire, oil, cold, acid, again so many choices.
Mastery is the only thing that's more specific in its description, but that's almost as a service to the fans, it could easily be described as something else entirely that is an enhanced version of the particular characters base power.
I love the idea of a low tech world like Weik where Sorcery exists and people walk around throwing fireballs at each other.
Protect is just as broad too, stone skin, bark skin, a force field, a swirling blizzard
It's a really cool power, especially if you don't mind conflict!