This mod used AI.
This mod add some effect, mobs and two aromr

Borrow:
This effect allows you to draw your bow to its full potential instantly, but each draw will incur a debt effect. When it finished, it will give a repay effect.
Debt:
When you have this effect, you are prohibited from eating, drinking, opening workbenches, etc. If you have this effect at level 255, then you will get 255 damage. If you have this effect, but don't have borrow or repay, then it will grow 20 levels every second. If you have the effect repay, each draw of the bow reduces its level (it doesn't need to be fully drawn).
Repay:
When you have this effect, each draw of bow reduces the level of debt. When the effect debt disappear, it will disappear too.
and etc.