idk man, but i'd assume the book would manipulate a chance-based attack relying on some explained mechanic, like maybe devotion. the more devotion (amount of health, kill count or something else) the higher the chance of inflicting something. i mainly hope it'd be a utility weapon, giving you buffs through luck like how hakari's technique works. (jjk) as for the sword, i think it'd also need to have a key to movement, like how the only objects you can grapple to in ultrakill are grapple points. maybe throw the sword, it hits the ground in an arc, creates a shockwave, and you can use the shockwave to bounce higher. the scepter would probably be like a gravity gun, but you could only change the gravity left, right , up, down, towards you and away from you. this would have a cooldown, of course. the enemy would immediately be falling at a fatal velocity.
i put so many words in the instructions (where they shouldn't go) and now i have no idea what to put for the notes and credits. OH WELL