Could this be an unintended boon?

"Congratulations, Affection Level has reached its peak of 100 points! The special effect of Unobstructed Social Communication Charm Syndrome is activated! You've earned the ultimate Full Moon friendship reward: the Ghost Slave Pact!"

As this prompt message appeared, a mysterious and arcane symbol surfaced on both Alexander and Full Moon's foreheads.

The moment the symbol manifested, a spider-like pattern abruptly emerged on Full Moon's forehead. Dark energy surged from it; the pattern writhed as if trying to escape. But to no avail—the Ghost Slave Pact was overwhelmingly domineering, vanquishing the spider-like pattern instantly. 

A newfound sense of control filled Alexander, as if he could manipulate every facet of Full Moon through this pact. However, something felt off; it seemed as though this pact had connected to something far more significant.

"Ow—uh—ah!" A cry of pain suddenly snapped Alexander back to the moment.