Simple idea for spirit bomb,make it to where there is a second gauge for the energy of living thing,or what the spirit bomb is made of.Make it to where when you use it the guage decrases depending on how long you charge it,and when it goes down it goes back up at a set speed.So that ppl can just shoot it over and over and over.In dbz i dont think goku could continuesly draw energy from the earth,animals,plant,(living things) without them running out of energy at one point.What do you guys think,also if this idea was already posted im sry,i hope it isnt the same.