The mod adds a scythe with several abilities. The scythe gives mana for kills, and does not allow you to regenerate mana yourself. In this case:

—Left add. the button releases a magical skull;

—The right additional button turns on the period during which kills restore health;

-Both buttons simultaneously decapitate enemies in a radius around the player (injures the player).

All attacks use mana, so you have to accumulate it by killing.