For starters, the mod introduces 2 new resources that will be essential for most of the playthrough, these being sexium and fairy dust, they are essential for most of the mod's mechanics and will be explained below.
Sexium is an abundant quartz-like mineral which grows into pink crystal formations embedded in rock. It is often found in large groups of 6 and each ore gives about 4 sexium crystals.
Nobody really knows how it came to be, various artificial beings are powered by it, and it is essential for channeling venutian energy.
-OBTAINING-
Sexium can be found underground, large groups spawn exposed to air, specially in ravines. Walking penises and Drones drop it upon death.
-USES-
Sexium has a variety of important uses, such as the soul dagger and cupid arrows. It can also be crafted into a block like many other minerals for storage purposes.
-DARK SEXIUM- 
Dark sexium is deactivated sexium, stripped from its venutian energy after being smelted in either a furnace or blast furnace. It is now a purple colour and can be used to craft a variety of building blocks, most notably fairy bricks. It is also used in the creation of the soul dagger.
As the name suggests, it is dead fairies crushed into a fine powder with afrodisiac and psychedellic effects. It is a fine glittery powder that is essential in venutian magic.
-OBTAINING-
Killing fairies and related mobs will give you fairy dust as part of their loot.
-USES-
Like sexium, it is used in the creation of the soul dagger. It is also used together with dark sexium to craft fairy bricks, and can also be used to roofie cookies.