Meaning

Rain was hit in the chest and then he felt his ribs cracking even before his back was smashed against the wall behind. The wall was so hot that Rain felt like he had jumped into a pool of hot oil…

Before Rain could even grunt in pain, he saw the beast queen raising her fist and swinging it down. Around the same time, Terra charged toward them ignoring the pain on her whole body. She was healing herself, but not as fast as she wanted… Still, it was too late.

When the fist of the beast queen was a few centimeters away from Rain's face, suddenly, a massive ice first appeared on her side and slapped her away. The beast queen was pushed away and Rain had enough time to get up and then spat some blood away. 

Rain only summoned a single ice arm, so the technique lacked refinement and impact, but he used all of his mana to summon that, so it wasn't something that could be taken lightly…