Destiny Craft

Firstly you need to locate the new biome:

When you enter it, an achievement will be granted, hinting you to sleep in the biome

After sleeping in the biome, you'll get a soul vial, so you can craft a potion to get to the first dimension (you can not get another vial unless you drink the potion)

Be sure to take a some blocks, some food, torches and a way to save yourself from falling or suffocating in the wall, as well as 4 or more rest kits to save yourself from dying when you become blind

you can use any cooked meat

then find a structure, break the block in the center and obtain an arrowtip that will teleport you to the overworld and allow you to craft a destiny arrow

every other dimension is pretty much the same, except you need different rest kits and potions

second potion

second rest kit

get into the dimension and try to find the second structure

Get the arrowtip and return to the overworld

second arrow (allows you to use a weapon form of your crystal

now you can use crystal's weapon form [RMB] (some crystals are unequiped on [RMB] and some on [x]

craft the third potion

any sand will do

gather some resources and make a some rest kits (5-6 recomended for this dimension)

drink the potion and get to the third dimension

arrowtip block can be burried in the sand but there's always one in each structure

return to the overworld and craft the arrow

Congratulations! You now have a requiem ability!

(activated by pressing a button: standart [v])