The heart is a weakness for many creatures, especially for demons, known for their tenacious life force. Having spent such a long time in the Abyss, Lancelot had developed an almost muscle-memory-like instinct to strike at the heart. In most cases, this subconscious reaction allowed his attacks to be faster and more precise, executing miraculous dodges.
However, when facing spectral enemies like a succubus, striking the heart was no different from hitting any other part. It would still deal damage, but not a fatal blow.
The succubus's face revealed a ferocious expression mixed with pain and rage as she fiercely pounced towards the Human Knight. Lancelot thought to himself, 'this is bad,' but he had rushed in too eagerly to save someone and it was too late to avoid the attack now.
The succubus crashed right into him and then passed completely through his body, a sensation that felt like suddenly plunging into icy cold water, seemingly draining even the strength to breathe.
