I spent well over 15 minutes puzzling over the board, simply trying to figure out what the heck I was looking at, to be completely honest. It seems like a great idea, with sacrificing to then use souls as a currency to do actions, with the fear that if you sacrifice too much, warriors can be permanently removed if you try to do too much. However, I'm lost as to where you get enough warriors on the board to do all the sacrificing needed. The only two ways to get warriors on the board is to have no altars, and get them when placed, or spend 1 soul per warrior placed. However, throughout the game, you remove warriors from the board for 1 soul. There is no real way to get multiple warriors on the board, the recruitment needs a full rework or something, but it currently doesn't work unless I am blind.
Additionally, the amount of "OR"s is ridiculous. Every action you do needs to be completely simplified down to one thing, especially since you have this many separate actions. This needs to be simpler. My suggestion - make one area where you do all actions with souls, in one area, without all the types of actions (move, battle, etc) being scattered all over the board. Similarly, put all the types of sacrifice you can do into one area and simplified. Instead of a lot of actions that are "Spend X souls OR sacrifice Y warriors to do _____", just sacrifice into souls in one area, then do actions with souls in another. All your action economy goes through souls at one point, no skipping by sacrificing straight up. That should help your clarity immensely.
The good things: Midnight - fun idea and definitely adds, I like it and it seems to work well.
One-time use ability - Very interesting and adds strategy for when to use it. Adds even more sacrifice.
Spring of Rebirth - Good idea, make it smaller, like 10 warriors or something, you'll never realistically hit that 15 limit I think, and 10 adds to the strategy of not wanting to go over.
Ultimately - good ideas, but the theme and fun interesting mechanics are lost in the confusing things, the soul vs sacrifice thing needs to be simplified, and recruiting needs to be more obvious and easier as its impossible to sacrifice enough warriors to do anything without large amounts of recruiting.