Opus Daemoniums are items that allow a Player to activate or deactivate Requiem’s death mechanics, by respectively awakening or destroying a Player’s demon.
There are 4 variants of Opus Daemoniums: Neutral, Curse, Cure, and Banishment.
Those books can only be used while in a regular player’s body, with one exception: if used while possessing a mob and after having started a curing process (with weakness potion and a golden apple), they will expedite the process and turn the player into the desired type.
In the Requiem 2.0 version (1.17 and above), the Opus Daemonium has been replaced with the Mortician’s Conversion Trade.
Neutral Opus Daemoniums are the base to obtain the other variants. Using one allows a Player to write a phrase inside it. If the phrase is correct, the book can be signed in exchange for 5 experience levels, and converted into one of the two variants, depending on the content written.
Curse Opus Daemoniums allow a Player to wake their demon. Therefore, when used, they activate the mod’s death mechanics.
To convert a Neutral Opus Daemonium into a Curse one, one must write “Ad vitam aeternam” inside it and sign it.
Cure Opus Daemoniums allow a Player to destroy their demon. Therefore, when used, they deactivate the mod’s death mechanics.
To convert a Neutral Opus Daemonium into a Cure one, one must write “Ad vitam mortale” inside it and sign it.
Banishment Opus Daemoniums allow a Player to cast aside their physical appearance and become a Wandering Spirit.
To convert a Neutral Opus Daemonium into a Banishment one, one must write “Ad vitam vagrate” inside it and sign it.