[57 Days Before The Awakening]
If there is one thing more terrifying than the word terror itself, then it is a beast from the Doom Universe. They mostly refer to them as Doom Beasts.
Klaus had already had interactions with five beings from that universe, and now, he was in the presence of another.
However, while the Five Monarchs are known to be Supreme Beasts from that race, the Nine-Headed Hydra Dragon can be likened to one of the Ancient Ancestor Doom Beasts of that race.
Its mere presence was just too terrifying to the point that Klaus felt his soul shudder right when he saw the head.
Initially, when the Nine-Headed Hydra Dragon spoke, Klaus felt his heart shake.
However, just when that fear, the weakness, and that overpowered suppression were about to overcome him, something snapped in Klaus's mind, and memories from his first incarnation started pouring in.