I have been often thinking of the balance as a school that should handle something from all others. Matter is, although elemental schools are represented, spirit ones arent. We do have a blade, yes, but no use for it!
So i was thinking of a morph card that would allow to change hydra into chimera.. A similiar creature that would breath spirit attacks instead of elemental - wich would finally allow for some use of those blades. And of course still stay as a balance card (we already have no DOT, since polar swarm is cast as ice)
Ok a chimera doesnt have to look like a hydra.. but i guess a morph could slightly change its form.