[CLOSED PR] Adds in a new chaplain antagonist item, the heartlight knife

[Jakson]

Yeah like Nano said it seems fine but I don't see it filling any huge niche. Maybe if it had a teeny bit longer stun than the syndicate dagger, making it a stun tool instead that's bound to yourself? Even then, any traitor item the chaplain gets will just get overshadowed by the Faustian Bargaining Kit, since that's what everyone plays chaplain for.

Maybe if it had a different effect from the syndi dagger stun, maybe inflicting some curse or something and disappearing when it hits someone, or maybe make it randomized and add a whole list of funny effects.