{redirect}

[BlackJester]

LOL  You got me.  It DOES work on non-creature permanent spell on the stack, though.  That's what I was thinking, I forgot about the non-creature stipulation.   

[Alsojames]

Yup. Cancel is a spell on the stack and you can change the target to itself.

{Cancel} and other counters cannot target themselves. But you can redirect the cancel to target the {Redirect}. It's the first card ruling (either in the app or on Gatherer)

Wouldn't that cause a paradox on the stack, where cancel cancels the redirect which means it doesn't redirect the cancel which means it cancels its intended target anyway?

[Poof]

Once cancel cancels redirect it's been used it can't just magically recast itself onto the stack again.  The spell is resolved and spent

[BlackJester]

Yup. Cancel is a spell on the stack and you can change the target to itself.

{Cancel} and other counters cannot target themselves. But you can redirect the cancel to target the {Redirect}. It's the first card ruling (either in the app or on Gatherer)

Wouldn't that cause a paradox on the stack, where cancel cancels the redirect which means it doesn't redirect the cancel which means it cancels its intended target anyway?

I just had an {Ambiguity} flashback. 😂

The redirect will resolve changing the counter's target. Then, as the Counter goes to resolve, it's target is not there and so IT does not resolve.