So uuh... Exactly how much do we know about reiatsu?
It's the spiritual power everyone uses for their magic tricks and all, but I've always wondered about its characteristics.
Can a person's reiatsu increase?
Do people "use up" their amount of reiatsu capacity in every battle? Do they put different amounts of it in different techniques?
When released, where does it go?
And so on.
There is Reiryoku the "gas tank" you could say, and Reiatsu the horse power. Reiatsu from what i understand has no limit, however i think reiryoku does, it comes down to how well one can access the reiryoku and turn it into reiatsu.
If someone uses all their reiryoku/reiatsu in battle then they die. So some always has to remain. Now can you put more or less into a kido spell or sword strike? Yes, because Kenpachi getting use to Nnoirta's skin says so, with Zan strikes, and incantations for kidos make the spell stronger, the only possible way for it to be stronger is if more reiatsu is poured in. Also Byakuya used sokatsui and messed up Yammy however when Rukia used the same spell it didn't have as big of an effect. I equate this to Byakuya poring more reiatsu into his.
Now i should say this is my thoughts about this, i could be wrong however.