I performed the necessary handseals and inhaled a breath of air and gathered my youton chakra. I focussed very good and channeled it into my lungs. I infused it with my breath, concentrated very good. I exhaled and released the breath with infused youton chakra out of my mouth and I manipulated it. I created upon exhaling, a burst of condensed lava. I added chakra to it and manipulated it more, it was compacted with chakra, It was fired at your clone, and when it hit him, The chakra bursted out and it exploded into many lava droplets. Because of the damage he received, he vanished. *poof*
Well first of all this is a strong jutsu, and it could even take on S rank fire and earth techniques. But it doesn't even need to directly hit the target because of several reasons. Well first of all, I always think that jutsus like this, fireballs, lava-balls are always good for distraction. It could block someone's vision and the opponent would be focussing on the lava ball, so the user may plan a move from beneath the opponent, like create spike that erupt beneath him and pierce him, he wouldn't expect that.
but not just that. The lava ball explodes into many lava droplets, so you don't even need to hit the target. You could just hit the surface, in front of the target or next to him, he might think you're missing, but the lava ball explodes and the droplets will hit him and still damage him