(If you happens to have read April's original ref, you might know better: https://www.deviantart.com/technopa.....-16-819931038)

I've never revealed it but, April actually has cryokinesis, the power to manipulate ice, mentally. Depend on how you view it, it's similar to or even stronger than ice magic alone.

However, since she has been a kid all these time, she never had a chance to use, not until she's an old enough teenager then she's able to harness it. But for all these years she hasn't use it, the power just keep building up, keeping on to overcharges. Eventually it became way overpowered when April was able to finally uses her psychic.

Her psychic power is stronger than Trevor, Lizzy and Sam having all their magics combined. But even being able to use it, she tried to keep it well hidden, refusing to use it unless she desperately has to (just like Sans, he won't fight the player unless they're doing genocide). Overall she has way more than enough energy to completely turn a hellish underground into an ice cavern, yet still having enough power to spare. And don't think about fighting back when she's having revenge, she also got extreme reflexes so whatever attack you're using it's blocked, and every time your attack is blocked, YOU take damage instead.