change Skarner's passive

I love skarner, but the crystal zones really limit his potential.

I think skarner needs a new mechanic/passive where his abilities can leave small, temporary crystals on the ground that empower him for a short time.

If you land a Q, it should leave a small crystal behind. If his W breaks, it should leave a crystal behind. When his E lands, it should leave a crystal by the first champion it hits.

The crystals will last maybe 3-5 seconds before being destroyed, or enemies can target/walk over them to destroy them. When he's near them he gets a small movespeed bonus. I think this would help him stick to his targets better and fit in well with the theme of the champion.

Thoughts?