I like it

Going to see how it looks with the rest.
I'll probably need four more.
Carbon Growth - Grows around you. Each charge you have increases your armor by X. When you get hit by a melee or ranged attack you lose one charge. At tl 5 you also gain X armor hardiness per charge.
Shard Storm - Activate to turn your Carbon Growth charges into a storm of shards around you. The shards inflict physical + bleed damage and increase your defense and ranged defense. The more charges go into the Shard Storm the more damage it deals and the bigger bonuses it provides.
Carbon Spikes - Activate to fire your carbon spikes. If you target yourself with this talent and have Shard Storm active, you fire one spike at each enemy in range per charge in your Shard Storm. If you target an enemy you fire one shard per charge of Carbon Growth at the target.
Sphere of Destruction - Turn your Shard Storm into a Sphere of Destruction that slowly moves across the screen. The sphere does more damage the more charges in the shard storm and has range equal to its current duration.