The idea of self-freezing is the best one.
I don't like the thing with the sharp icicles (?), but you could instead make a standard freezing-effect.
Something like:
He runs/jumps/dashes freezes himself, and because of the momentum, enemies get knocked down.
Oh well...
Actually I made this a while ago, you might even know that attack already.
Actually, if you're into the whole thing with the sharp icicles (?), then you could combine these two attacks.
But... You know.
The icicles (?) in the pic you posted are a little bit overdone.
I don't like the thing with the sharp icicles (?), but you could instead make a standard freezing-effect.
Something like:
He runs/jumps/dashes freezes himself, and because of the momentum, enemies get knocked down.
Oh well...
Actually I made this a while ago, you might even know that attack already.
Actually, if you're into the whole thing with the sharp icicles (?), then you could combine these two attacks.
But... You know.
The icicles (?) in the pic you posted are a little bit overdone.