- "She can cause people to experience excruciating pain that instantly incapacitates them. She can inflict this pain on only one target at a time; she must be able to see her victim to use her gift on him or her."
- ―Entry on Jane's gift[src]
Pain illusion is Jane's gift to trick an individual's mind into thinking they are in burning pain. Though it has no affect on the body physically, it is very useful and formidable, thus making it one of the most powerful known abilities.
- "And suddenly I was on fire. It was like I'd gone back in time to the worst night of my life. Fire was in every vein of my body, covering every inch of my skin, gnawing through the marrow of every bone. It felt like I was buried in the middle of my coven's funeral bonfire, with the flames on every side. There wasn't a single cell in my body that wasn't blazing with the worst agony imaginable. I could barely hear myself scream over the pain in my ears."
- ―Bree Tanner's description of the pain.[src]
Jane can induce an excruciatingly painful sensation of burning in anyone of her choosing. The sensation is powerful enough to incapacitate him or her, until the illusion is lifted by her. She can perform this power from a far distance, as long as she can see her target. The pain felt by the victim has been compared to the pain inflicted whilst being turned into a vampire, and therefore causes great fear to those who experiences it.
To a human, it is possible to overload the brain with the illusion and ultimately end in death. When sensing Jane's power attack her shield, Bella describes the sensation as sharp jabs stabbing at her blockage.
In the movie adaptations, Jane occasionally says "pain" before activating her gift, although the phrase is most likely for show.
Jane's power merely allows her to inflict pain on one person at a time, while her brother can affect multiple targets at once. This renders her vulnerable against several enemies, though she can redirect her focus to keep them at bay. Not many are aware of this, however, since Jane's presence alone can set several vampires in line out of fear that she might use her gift on them.
Since this power is illusionary, it does no damage to her targets physically, and can be easily blocked by Bella's shield. Also, she can only target those in her eyes' range.
Jane and her brother Alec manifested unstable forms of mental abilities at a young age. Whoever treated them with kindness was always rewarded, and whomever did the opposite always got hurt. Eventually, the superficial villagers deemed them to be dangerous witches and burned them at the stake. It was in this experience that gave Jane's power a specific form, as she directed all of her focus into hating the villagers and wanting to inflict the same burning pain that she endured before Aro changed them into vampire to save them.
One decade after her transformation, Jane displayed her power in battle for the first time on the Romanian coven's army; her and her brother's powers caused the entire army to be slaughtered, and had been known as two of the most powerful vampires in existence since then. While Alec provided more efficiency in battle, Jane was more effective in inducing fear in a crowd, which provided a somewhat peaceful confrontation.
- "Before I could react, before anyone could jump between them, before Aro's bodyguards could tense, Edward was on the ground. No one had touched him, but he was on the stone floor writhing in obvious agony, while I stared in horror."
- ―Bella's witness of Jane's power.[src]
In New Moon, Aro orders Jane to test her power on Bella Swan after he realized that his power didn't work on her. Edward Cullen immediately runs in between them and Jane targets him instead, causing him immense pain until she stops. At Aro's insistence, she directs her power at Bella, but for reasons she didn't know at the time, it has no effect on her. Since this is the first time her power is useless against a person, Jane immediately feels humiliated, causing a mutual hatred between her and Bella.
At the end of Eclipse, Jane tortures Bree Tanner, the sole survivor of Victoria's newborn army. In her quest for the truth of what had taken place that day, Jane found the perfect excuse to terrorize young Bree with her ability, forcing her to affirm what the Cullens had already reported. While Jane tortured Bree, Esme objected, telling Jane she would just have to ask, though she preferred to abuse her gift. Like so many of her previous targets, Bree came to fear Jane and her menacing power.
She also attempts to use her power on Bella again, but to no avail like the first time, much to her dismay.
In the movie, she attacks Felix after he suggested talking to Aro about the army's matter and reminds him that Aro's decisions are being 'watched', and therefore they have to decide on their own about the army's fate.
The Short Second Life of Bree Tanner
- "You don't need to do that, she'll tell you anything you wanna know."
- ―Esme and Jane[src]
At the end of The Short Second Life of Bree Tanner, titular character Bree Tanner describes the experience as being burned so painfully that she barely hears herself scream. Bree also witnesses Bella's immunity to Jane's tormenting power, and suspects her capabilities.
She can also see Jane's frustration through her childish smile, sensing that she doesn't like Bella's immunity to her power.
At the end of Breaking Dawn, Jane attempts to immobilize the Cullens and their allies, while the ancients of the Volturi to determine their fate. However, due to Bella's enhanced psychic shield, Jane's power is unable to affect anybody whatsoever, which deepens her animosity against Bella. Bella claims she "feels" the attack on her shield, and while it doesn't hurt, it isn't pleasant either.
In the movie, Alice shares a future vision with Aro regarding the outcome of the battle if it is commenced; in it, Jane uses her power to help destroy Jasper Hale and Seth Clearwater, respectively, but is then rendered powerless when Bella shields Alice Cullen, who approaches her for revenge. With her gift useless, she attempts to run, but Alice quickly catches up to her and feeds her to Sam Uley.
- Alec—Jane's twin brother—has the exact opposite of her gift. He can block the senses of his targets, and can affect many people at the same time. Like Jane, his power is merely a powerful illusion.
- Kate, a member of the Denali clan, has a similar ability. Her ability is to psychically shock people by touching them. She used it in Breaking Dawn against Edward several times to motivate Bella to project her shield around him against the pain she saw in his face.