You might be thinking, does this sound awfully similar to quake spell for mages? Well, you have the right idea, but that’s not entirely how this works. This functions similarly to an enhanced explosion and lasting “Quake.” The higher you are when using, it will take longer for you to fall to the ground (obviously), but you will deal more damage (slightly) and have a way bigger explosion. If you are flat on the ground you will jump a set distance in the air, but you will not air jump if you are already in the air. Casting defaults to legs unless your fighting style only utilizes arms (like cannon fist). You can adjust it to use your arms unless it only utilizes legs.
Lost Technique: Earthquake
Jump up in the air and put all of your strength into striking the ground, creating a massive explosion followed by tremors in the ground shortly after the fact.
Level required: 160 (320 strength first technique, scaling for 2nd and 3rd)
The quakes after the fact stay on the ground, at less consistency but if you are right on them you will take minor damage. They will last longer the more strength you put on the technique.
Customization:
Strength level: The amount of strength you put into your attack, from 50% to 150%. Going above 100% means going beyond your physical limit, making you take damage yourself and take longer to base charge in exchange for a more massive, damaging, and longer lasting attack. (The idea behind this is you can go from a safe 100% but less damage and size, or you can go to 150%, taking damage for dealing more massive damage and more size. On the opposite, you can go 50% for a quicker charge). More strength also increases the cooldown of this, too.
Casting style: Choose how you cast the technique. This varies from fighting style to fighting style.
Embodiment: Your standard embodiments.
Ultimate art: Increases charge time, damage and size of the technique. Unique ultimate art effect, allows access to 200%, though going beyond 150% will apply a unique effect, which reduces your overall stats (except defense) by 20% for 10-30 seconds depending on how high above 150% you set it.
What do you all think? This all look good, or do you think it needs some balancing?
EDIT: Removed forced screenshake from the idea, knowing that some people would be highly annoyed or caught off-guard from the disrespect to settings.