If so this is either another inconsistency or got retconned. Just see. A weak PH is already at SuperSonic range as shown by Fang Yuan.
Casual, base Wu Heir can perception blitz him(if you choose to test his prowess).
This same Wu Heir, all-out and full powered can't even react to the Heavenly-Ice-Wisp that is, naturally, a Xiantian Level creature but was being massively weakened at the moment.
Doesn't makes sense at all.
Isn't like it's bad, but between all main three(Physical Prowess, AP & DC), it's the least constructive to show how good really is a character fight Prowess.
Also this is very doubtful. Cause, as I said, a EX level thing is already enough to vaporise a whole forest/jungle. Even a small sized jungle(1km²) would require already more than 10 Kilotons of energy.
Same thing for current Ruo's Blade sacrifice, or 100 pellets(50 of them are at best a Pseudo Xiantian killer) being able to destroy a "3 miles range area" as said in the Haoran event.