Vial: +10 to Health.
Quartz Flask: +25 to Health.
Mystic Urn: Full Health.
Shield: +100 to Armor.
Enchanted Shield: +200 to Armor.
Torch: Brightens your view.
Map Scroll: A map of the entire area --- including hidden locations.
Bag of Holding: Increases the capacity of your inventory.
Shadowsphere: Temporarily renders you partially invisible.
Tyketto's Tome of Power: Temporarily increases the power of your weapons or "power-up"
The Tome will appear in the top-right corner of the screen while it is active.
Valador's Ring of Invulnerability: Temporarily renders you impervious to attack.
Inhilicon's Wings of Wrath: Temporarily enables you to fly. The wings appear at the top-left corner of the screen while this item is active.
Darchala's Chaos Device: Teleports you to the beginning of the level.
Torpol's Morph Ovum: Morphs your victim into a chicken. Finger-lickin' good!
Delmintalitar's Time Bomb of the Ancients: Drops a transparent bomb that explodes after one second.
Oh yes, it will hurt you as well if you're near it.