Here are some (system-agnostic) items you can feel free to drop into your game!

Glove of Ghostkind

When worn, this white suede glove allows the user to reach through physical objects as if it were incorporeal, provided the object is not thicker than the glove is long. The glove cannot reach through materials with special properties, such as mithral or cold iron. The glove can deal normal damage to incorporeal creatures, such as ghosts. Reaching into a Bag of Holding or a Portable Hole instantaneously shunts the wearer into a random Plane, and destroys the Glove in the process.

Deadlight Candle

This appears to be an ordinary, red candle, 12 inches long. When lit, the flame is white in color and very pale, giving off very little normal light. However, anything that has been touched by a corpse, carcass, or undead within the radius of regular candlelight is illuminated brightly for anyone to see. For instance, the candle can be used to see where a murder victim’s body was dragged off to and disposed, or to see the true form of malevolent spirits haunting a house. Paranormal investigators find these candles quite useful! A single candle will last for one hour.

Evergrave Rose

These roses have pitch black petals, but are otherwise luscious and beautiful. If placed upon the burial site or tomb of a creature, that creature cannot be resurrected or otherwise restored as long as the rose remains there. Unfortunately, ghosts and undead despise these roses, which are made from watering regular roses with distilled ectoplasm and exposing them to a harvest moon. Undead gain a slight advantage when fighting with someone who carries an Evergrave Rose.

Armor of the Sanguine Order

This moderately (+2 in D&D/Pathfinder) enchanted suit of leather armor appears a plain beige color when not worn. Once worn, however, they change to the color of the wearer’s blood and cannot be removed until Remove Curse or a similar spell is cast. Every night, the armor increases in one level of coldness, affecting the wearer and beginning to inflict constant cold damage within a couple nights. If the armor is cold, it does not provide its bonus. However, spilling at least a cup of blood upon the armor will restore it back to normal temperature and reinstate its bonus. The blood must be from the same species/race as the wearer.

Count Morovich’s Mirror

This ornate, six-foot mirror only reflects inanimate objects and vampires. It was commissioned by a vain, vampyric nobleman ages ago — his name is inscribed in the frame and his spawn are likely out there seeking their family’s heirloom!

The Still-Beating Heart of Sir Edelweiss the Just

Legend has it that Sir Edelweiss’s heart was ripped out of his very chest by a demon lord. But through the grace of his goddess, Sir Edelweiss was in mid-swing with his hammer, and his motion carried through, caving in the demon lord’s skull and defeating him even as Sir Edelweiss died. Through some divine miracle, Sir Edelweiss’ heart continues beating strongly to this day. Anyone within a 10 foot radius of the beating heart must make an exceptionally difficult will save or immediately begin confessing all their sins. Destroying the heart creates a portal to The Abyss / Hell, allowing more demons and devils to come through and finally seek vengeance for their slain demon lord.