TheLastOne
Person of impeccable tastes (for destruction)
I am legitimately curious how they did that. That kind of damage should need a fairly advanced construct and those drain power. Maybe they used the charge to build a super dreadnaught or something?
You get greater efficiency as your attunement and intensity increases - a Green Lantern was able to nearly rebuild a mass scattered planet at one point. While Paul is deeply attuned to his wants, he doesn't actually have very high intensity most of the time; his sanity keeps his wants from being all consuming, which makes him weaker even if he has a great deal of finesse.
This Lantern obviously REALLY REALLY wanted it. That's all that's really needed to get constructs that act on a planetary scale. It's well beyond the sanity threshold, of course.
The more interesting question is where (s)he is getting charge from.