That'll be tricky.
First up, it needs to be incompatible with Recovery.
But even ignoring that, there are issues.
For one thing, consequences really aren't that big a deal compared to Powers. Maybe I take a severe and a moderate and a mild to get Mythics, but those Mythics will let me take without consequences a hit that would have inflicted a mild and a moderate and a severe. (Assuming I was going to take 12 stress over my track, I could absorb that with 12 shifts of consequences or with +3 to dodge, armour 3, and 6 extra stress boxes.)
On the other hand, those consequences will last longer than those Powers. It's tricky to measure the value of two things that apply on different timescales. And there's really no precedent for this in the RAW.
Also, this Power creates a huge incentive for foes to run away and attack again later. That's a bit of a challenge to handle mechanically.
And it's not clear when you can activate this Power. Is it an action?
So, yeah. I'm not saying this won't work, but it'll be tricky. And it'll probably be more expensive than you were hoping.