Give a few more Crystals usage in boss fights

[Terran]

Maybe instead of having your ammunition refilled to the cap constantly, you could get a 200-300 max (Depending on the gun, of course), and "power-ups" would spawn that you could grab for more ammunition. Or, hell, even health or temporary invincibility or something, but mainly ammo.

That means Dimension Crystals would be useful and stuff.