This is why I had Agatha IT away from the blast, so as not to be disoriented by the explosion herself. Unfortunately, as Monado pointed out (much to my chagrin and/or laughter), an omnidirectional 28-million blast would do...more than that. Much more. We're talking "completely annihilate the inner planets of the solar system, burn the surface off of the outer planets, and critically damage the sun" levels of firepower.
Uh... based on how I remember the fight with Vegeta and Goku, a fighter with a power level of 24000 still has to put some
effort into a planet-destroying
directional blast. If so, then an omnidirectional blast at twenty-eight million actually shouldn't do that. It'd wreck the planet it's done directly above, because about half its energy would be radiated into the ground below the blast, and an effective power level of fourteen million is still enough to annihilate a planet, clearly.
But if such an explosion blew up in, say, low Earth orbit, then by the time the blast had radiated outward to hit the moon... The moon only makes up a bit less than one ten-thousandth of the area of the sky, and absorbs one ten thousandth of the blast. Effective power level of 2800, spread out across millions of square miles of surface area.
Not a drilling beam of the type normally used to core out a planet, not even something like Frieza's Death Balls that he used to destroy Planet Vegeta or Namek.
The sun, which is much farther away but much larger, catches the same effective power level spread out over ten thousand times the area; I am almost sure it wouldn't blow up or be destabilized. And other planets not part of the Earth-Moon system are so much farther away that they would in turn absorb far less energy than the moon.
Effective power level would be... down in the tens or less. Nowhere near enough to blow up or even seriously scorch a planet unless we accept
total inconsistency with observed effects of blasts in atmosphere.
That said, you'd still pasteurize the planet you were
flying above, so that's true.
...
There's also a certain issue of incompatibility with how energy blasts that are clearly supposed to be threats to, say, Ginyu Force level fighters can miss or be deflected and hit the landscape, and they destroy a mountain and leave a mile-wide crater or whatever but
do not destroy the planet. In situations that sure don't look to me like the fighter in question deliberately drained all the energy out of his big blast to stop it from wrecking the planet.
But we don't really have a good way of squaring that circle, as far as I know. The best I can come up with is that "destroyer of worlds" mode is a thing that fighters with a power level below, say, several hundred thousand have to consciously
turn on and that there's some kind of pseudo-magical effect that enables them to pump enough ki into a planet-sized object to destroy it, when they just plain couldn't do that to normal objects including one another.
And yeah, I know, that would turn a lot of calcs and power estimates inside out if true.
Unfortunately I accidentally left in the IT thing like an idiot, when Agatha would, in this situation, go straight for the shotgun under the chin. The current version...does not make sense for Agatha to do in this situation, and in fact you perhaps only gained a grapple opportunity because of it. So I'm going to fix my post shortly. Are you alright with editing yours?
Well, as to Agatha ITing away... I mean, a
shaped charge that could potentially blow up a planet in the direction it's fired would still have at least enough sidescatter that it could potentially be dazzling or disorienting. Teleporting a bit of distance away would seem prudent, given that you expect the blast to actually work and do enough harm to momentarily inconvenience the opponent.
... I charged you from the ground. You'd be blowing up the planet unless Taka tanked the entire blast. That seems rather in violation of Mato telling us 'no collateral'. I'm willing to change my post up if needed, but I'm not sure the fix is a fix.
If the directional breach is designed to lock on and target someone's ki signature, it wouldn't be that big a handwave to assume it directionally blows up in the directions where, and only where, it sees the sky obscured by the ki-using opponent.
That said... honestly, if I
wanted to use fridge logic about how planet-destroying energies get slung around in DBZ fights without the planets going 'boom,' I could probably pick
everything to death. The narrative rule in DBZ seems to be that no matter how powerful you are, at least until you reach FPSSJ energy levels, it takes a
deliberate act of will to charge a blast powerful enough to destroy a planet. You can't do it by accident without charging up to it. Sure, a power level of several thousand is enough that you can do it, but even being a thousand times more powerful than that won't let you do it casually with a flick of the wrist. Not even Frieza does as far as I can tell.
I may be forgetting something, granted.