Ice-Blasting: This power worked by blowing on one’s hand and creating a cloud of ice, or a focused blast of cold, capable of freezing people and objects. This power was held by one of the Halliwell’s great, great, aunts, P. Bowen.

Ice-Blasting

Ice Cream Man: A mortal appointed by the Whitelighter Council to drive the Ice Cream Truck. When one dies, another is called. The Ice Cream Man’s duty is to use the truck to ensnare and destroy demon children.

The Ice Cream Man    The Ice Cream Man    A former Ice Cream Man in combat

Ice Cream Truck: An ice-cream van created with magickal machinery. It is capable of capturing young demons and storing them in a pocket dimension inhabited by an entity called The Nothing, which consumes them.
Demon children are drawn to the truck by the sound of the Devil’s Chord, a series of chords specifically designed to attract them, and then sucked in through the window.
The truck is driven by the Ice Cream Man, a mortal charged by the Whitelighter Council with the task of hunting down demon children.
The only way to escape the truck’s dimension is through the back door, which can only be opened by mortal hands.

The Ice Cream Truck    Prue & Phoebe in the truck's dimension

Illusion, Demon of: A demon with the ability to cross over from reality into the realm of illusion, his goal is to create violence in society. His powers give him the ability to leap into movies, appearing on screens as though part of the show, as well as the power to freeze mortals watching a movie he was in, send characters from a movie into reality, and implant subliminal thoughts in the audience, making them violent and angry when they leave. Witches and other supernatural beings, such as Whitelighters, are immune to the Demon of Illusion’s powers.
The characters her sends out of films are also immune to the powers of Witches and can only be killed in the way they were killed in the movies; they are invulnerable to all other attacks.
To ensure those he affects are already open to his suggestions the Demon of Illusion usually chooses to hide in violent movies, preferring horror.
The Charmed Ones vanquished the Demon of Illusion by burning the film of the movie he was in, but it is not clear if there is a spell or a potion that would vanquish the demon magickally.

Immunity, Ring Of: Patty Halliwell was forced to bless this ring and give the Warlock Nicholas immunity to her daughters powers. When Nicholas was vanquished the ring fell into the possession of the Charmed Ones.

Incineration Demon: Piper Halliwell made short work of this demon with her explosive power. Though the demon was worthy of an entry in the Book Of Shadows the sisters did not need this information to vanquish him.
The Incineration demon looked like a human male, and possessed the pyrokinetic ability to incinerate human flesh. His power was channeled through his eyes.

Induce Sleep, Potion To: This potion puts whoever inhales it to sleep. Its ingredients are unknown. 

P. Russells cousins curse and kille herInfinite Lives Curse: A curse cast against the Witch P. Russell, an incarnation of Phoebe Halliwell, by her cousins in order to vanquish her soul through all of its lives. It was designed to stop Russell and Anton, the warlock, from ever being together and becoming a powerful force for evil. It did this by ending the life of the reincarnated soul on February 17th, and would continue to kill the soul through all of its lives. The words to the curse were: 

Evil Witch in my sight,
Vanquish thy self,
Vanquish thy might,
In this and every future life

The only protection from the curse was the amulet that Anton gave to Russell. Phoebe Halliwell was able to use it to stop the curse from ending her souls present life.

Inspiration, Ring Of: Created by good magick to channel creativity in times of desperate need. The Ring was capable of entrapping Muses, concentrating and directing their power.
The Leader of a Warlock Faction, Devlin, managed to appropriate the Ring for his plan to take over the demon world. The Charmed Ones foiled his plan, returning the Ring to its rightful owners and freeing the Muses Devlin had captured.

Devlin and the Ring Of Inspiration

Instant Karma backfires for Paige MatthewsInstant Karma Spell: Capable of making a demon feel the pain of his victims, this spell can be cast with varying effects. When Paige Halliwell cast this spell she changed the word ‘demon’ to ‘dirtbag’, casting it on a mortal that had been sexually harassing her.
In this situation the spell caused the harasser to become harassed himself, to an extreme degree.
Because Paige cast this spell for personal gain it had an unfortunate backfire: her breasts grew to disturbing proportions. They only returned to normal when Phoebe reversed the Instant Karma spell with a spell of her own creation. While speaking the words one must burn them on a piece of paper above a candle flame.

Guided spirits,
Hear our plea,
Annul this magick,
Let it be

Invoke The Power Of Three, To: The spell that the Halliwell sisters used to unbind their powers. It is at the front of the book of Shadows. Phoebe cast it by saying these words:

Hear now the words of the Witches,
The secrets we hid in the night,
The oldest of Gods are invoked here,
The great work of magick is sought

In this night and in this hour,
We call upon the ancient power 

Bring your powers to we sisters three,
We want the power,
Give us the power

Immortality: The ability to live forever and not age. The Warlock Anton was said to be immortal.