The explosion was massive, and Gravis was thrown back as all his forward momentum had been stopped by it. The armor on Gravis' chest started melting, burning the scales and muscles touching it.
This was a huge issue since these muscles and scales were essential to protect his organs from blunt force. With their current burned state, if Gravis got hit again, his organs might break through his flesh and skin and shatter on the liquified armor. Regrowing organs took up a lot of Life Energy.
Yet, Gravis had an even bigger issue. Since Gravis' forward momentum had been stopped, the Emperor could now unleash a follow-up attack.
BOOOOM!
The burning claw of the Emperor hit Gravis' back, melting and destroying the armor on it. Additionally, Gravis' spine broke into pieces and also became burned. Splinters of his spine destroyed parts of his organs as he got shot into the distance again.
BRRRR!