How to use spirit?

[Mister Sir]

new to the game, started witch and have no clue how to use spirit.

I recall hearing in some dev vids that you can assign it to summons to buff them or add summons by allocating it somewhere. So far it is beyond unclear to me how to do that. Clicked all buttons, can't find it.

[Mudpony]

Spirit is basically a resource used to support certain skills, so your spirit total limits how many of those skills you can have running.

A bunch of the witch summons, like the very first one you get, skeletal warriors, require spirit to summon. As you level the skill up, the spirit cost per summon will get lower. This will mean you will be able to summon more of that type of summon and/or run other a greater variety of types.

And there are some buffs you can run as well that cost spirit. You'll get that after you defeat a certain boss.