Momoshiki mould fire-based chakra and encased his target with it. By using certain hand gesture, he capable to simultaneously applying increased pressure and inside the sphere and also absorbing chakra from his target. The target will drained all of his chakra and will leaved burned and crushed.
It's effects is very fatal to the target, and even make Sasuke burned half of his body and collapsed, brought him near his death. However, thanks to Naruto's Yin-Yang Release, his wounds healed instantly and later able to fight back against Momoshiki.