Alex's so-called defeat which Tim won by cheating was imprinted in his mind which burned his fire to challenge him once again and crush him thoroughly.
But he decided to get stronger and then challenge him so that he can beat his ass in the next round and take revenge for his humiliation.
Alex was really caught off guard at that moment.
How can he know that the man who reached the legendary rank will suddenly burst out like a maniac in fear of life?
It's not as if Alex was going for the kill for real as it was just a spar.
Due to the strong coercion and frightening burst of his mana, Alex's body was invaded by Tim's mana which had been creating havoc inside him.
He wasn't at the legendary level so he can't protect himself from Tim mana invading him and a low-tier healing spell wouldn't work on it.
And higher tier healing spells are a big no and using them would create a mess as the knights from Kinley might become vigilant about it.