Conversion - She was able to transform Olivette into a hamster as punishment for her wrongs against Rowena.She also turned three Grand Coven witches to dust using a witch-killing spell from the Book of the Damned. She attempted to obliterate Dean with a Gaelic Obliteration Spell which he only survived due to the Mark of Cain. Molecular Combustion - Through spells, Rowena is capable of obliterating people.She was also able to resurrect herself twice through the Resurrection Seal. Resurrection - With the Spirit Resurrection Spell she created, Rowena was able to bring back someone who had died though she never used the spell as it was intended for Mary Winchester.The spell is less efficient against powerful demons such as Crowley, but even here it can at the very least induce severe pain. She is so far the only witch to show the ability of killing demons with magic. Killing Demons - Rowena crafted a spell called Defigere Et Depurgare that was capable of quickly slaying ordinary demons using a hex bag.Though she stopped creating it when she learned that Mary Winchester was happy in Heaven, Sam was able to finish it and use the spell to bring back Eileen Leahy. Rowena also created a resurrection spell capable of bringing a dead person back to life by turning spirit into flesh. She also created Sanetur Acre Vulnus, a healing spell capable of closing the rupture leading to Hell which was created by God himself. Spell Creation - Rowena can create powerful spells and is noted to have made Defigere Et Depurgare, one of the only spells known to be capable of killing demons.However, it took her quite some time to heal fully from the significant damage Lucifer inflicted upon her the second time he killed her. Regeneration - The Resurrection Seal not only revives her, but also regenerates all damage done to her, including the restoring of her crushed head and the significant burned state of her body.She could also place the Resurrection Seal on others and is able to recharge it as much as she wants. Self-Resurrection - By casting a resurrection spell on herself as a fail safe, she was able to revive herself both times after Lucifer killed her.She has lived for at least 300 years, if not longer. Immortality - Rowena can live for a very long time.According to Michael, due to all the centuries of practicing magic Rowena's body is able to withstand the strain of being an archangel's vessel. Furthermore, she claims to be the only person capable of opening Lucifer's Cage. However, while the Enochian sigils she used to bind Lucifer prevented him from teleporting, they did not remove all of his powers (though this was intentional as she was working for Lucifer). She was also able to conjure Lucifer and is capable of opening his cage. With knowledge from the Book of the Damned, she was able to perform the Mark of Cain removal spell, which eventually freed Amara. Her magic is strong enough to affect the King of Hell and a fallen seraph even angels are unable to heal her curses. She is also able to cast a spell that obliterated a human with ease. It is unknown whether or not the Attack Dog Spell is of her making. She even has the ability to create some spells of her own ( Defigere Et Depurgare). Witchcraft - Being such a powerful witch, Rowena is extremely skilled and experienced in the use of spells and hex bags.In Golden Time, Sam states that Rowena may have been the most powerful witch of all time. Rowena herself admits that she doesn't know if she'll ever regain all of the magic she lost. Following her attack on Billie, Rowena exhausted much of her restored powers, reducing her magic back to about the level it was before she unlocked her powers. After her true power was unlocked, her eyes glow purple whenever she uses magic.

At the end of the same episode, Rowena's true power was unlocked, making her even more powerful than she has been in the past to the point that she could kill Reapers and alter fate. Later Dean called her 'the deadliest witch in the world'. One of Crowley's minions called her ' the most powerful witch on Earth' and even himself once refered to her as 'a colossally powerful witch'. Although her powers were previously somewhat reduced due to Olivette's sealing, she was not significantly affected. After training throughout her life, she has mastered and collected a vast arsenal of spells and other magical objects, which vary in complication. She is among the most powerful witches to appear in the series, and according to Sam one of the most dangerous witches in the world. Rowena is an extremely powerful witch that has been around since the 1600s.

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