Every action has a Chakra Cost that subtracts from your total Chakra Pool.
I.e. User has 100 Chakra Pool. They use a Jutsu that costs 20 Chakra. Their pool is now 80.
Ongoing costs are paid at the end of the users’ turn.
Pool is calculated by your SOUL stat x 10.
Boosting SOUL through Jutsu will never increase your Chakra Pool.
If the user’s pool hits 0 at any given moment, they will go unconscious for five turns.