Re-purposed Souls are used to upgrade and operate golems. There are many different types of Re-purposed Souls to upgrade golems, but first you will need to collect souls from a 'source'.

To collect souls, you must first create a Soul Dial.

X=Compass, Y=Soul Sand, Z=Diamond:

Z Y Z Y X Y Z Y Z

250 Spirit, 100 Death, 100 Metal

You then need to right click a mob/animal with the Soul Dial, and if they have 0.5 hearts of health they will be killed and drop a Soul. If they have more than 0.5 hearts then the Soul Dial will take 2x durability damage and do nothing.

Once you have your soul, simply infuse it with a compatible aura to create a Re-purposed Soul!

Each soul takes 400 units of aura

Speed (Move Speed) +1 per soul --Air

Haste (Attack Speed) +1 per soul --Fire

Power (Attack Power) +1 per soul --Energy

Strength (Items Carried) +1 per soul, (Item stacks) +2 per See [Golem UI] --Earth

Sight (Search Radius) +1 block per soul --Light

Reach (Interaction Radius) + 1 block per soul --Vacuum

Health (+Max Health) +2 per soul --Life

Regeneration (Health regeneration) +0.5 per soul --Holy

Processing (Decreased operations timer (time between operations)) -0.2 seconds per soul (Don't know if this is possible) --Tech