Supernova

Action: 1
Resources: Upcasting
Type: Emitter
Size: Sphere 
Attack: Light 
Damage: D4 Fire
Hold

You create a small star within your hand, pouring light into it with every action. When you hold the ability the damage die of it goes up, D6, D8, D10, D12 then finally a D20. You spend an action to start the Supernova and will have to use an action to fire it. The amount of damage Supernova dose is an amount of damage die equal to the resources poured into it + your casting modifier.
If your Supernova is destroyed before you fire it, the Supernova will count as targeting you dealing half the amount of damage it was meant to.