Perhaps no hero's (or villain's) powers are more volatile and mysterious in the Marvel universe than those of the Scarlet Witch. It's often the subject of debate whether or not she's using real magic or whether mutant powers allow her to alter reality. But there has always been one aspect of Wanda Maximoff's powers that is so crazy that writers should utilize it more.
Wanda was initially introduced as a member of the Brotherhood of Evil Mutants run by Magneto, who at the time was said to be her father (though that has since been retconned). Not long after her debut, she decided to turn over a new leaf, leading her and her brother Quicksilver to apply for an open call to join the Avengers during the team's early years. From there, she began her decades-long association with the team, even forming a romantic relationship with fellow Avenger Vision and manifesting two children with the android.
While her brother Pietro has the simplified power of super speed, Wanda's powers are a bit more ambiguous and have been retconned several times. Her original powers allowed her to affect probability and place "hexes" on people. Marvel later leaned into the character's mystical nature, having her use "chaos magic" to perform a number of magical feats. But when Wanda had a nervous breakdown during the Avengers Disassembled event, Doctor Strange revealed that there is no such thing as chaos magic in the mystic arts. This suggested that her mystical abilities were a result of her mutant powers, but this was retconned again when it was revealed that Scarlet Witch never was a mutant in the first place. Over in the Ultimate Universe, however, Wanda's powers are more grounded in the nature of probability. Writer Mark Millar, in the first volume of The Ultimates, takes this idea a step further by actually forcing Wanda to calculate the mathematical variables on the fly while using these probability powers.
This idea is a very cool way of looking at the Scarlet Witch's abilities and actually limiting their scope. In the groundbreaking crossover House of M, Wanda's powers go so far as to rewrite the entire reality of Earth while also wiping people's minds in the process. To put this act in perspective of probability, there would be no way for the Ultimate version of Scarlet Witch to be able to calculate the massive mathematical formulas necessary for such a spell. In fact, there are occasions when Wanda seeks to do things that are too complicated and beyond the scope of her abilities.
In recent years, Wanda has been leaning more heavily into the magic side of her powers, seemingly merging her comic self with that of her MCU counterpart. But this grounded approach to her probability altering powers shows another side to the Scarlet Witch that fans might not be aware of. It shows she has to have the intellectual and engineering prowess to actually pull off her abilities. While the Scarlet Witch might actually become the witch of her namesake, it might be interesting for Marvel to return to this more pseudo-scientific approach that she had taken in the Ultimate Universe.