Vibranium:
Currently, Vibranium Ore does not generate naturally, and so must be spawned in using commands. To give yourself Vibranium Ore, use the following command:
/function superhero:give/vibranium_ore

Mining Vibranium with a pickaxe (currently all picks work) will give you Raw Vibranium. To smelt Raw Vibranium, throw it in a cauldron with a lit fire (not campfire) beneath it and you should get a Vibranium Ingot.

Chocolate Milk
To revert any superpowers and return to normal, craft Chocolate Milk. To craft, simply put a Milk Bucket, Cocoa Beans, and a Glass Bottle in the crafting grid in any order. Chocolate Milk will act the same as regular Milk if you don't have any Superpowers.

Infinity Stones:
To craft the Infinity Stones, you need to surround a dye with eight nether stars. The color of the dye will correspond to the stones as follows:

Power Stone - Purple Dye
Space Stone - Blue Dye
Reality Stone - Red Dye
Soul Stone - Orange Dye
Time Stone - Lime Dye
Mind Stone - Yellow Dye

Currently only the Tesseract can wield an Infinity Stone, but holding each Stone will give you certain powers;

Power Stone
When the Power Stone is in your inventory, you will start taking damage and will quickly die if you are not strong enough. When the Power Stone is in your main hand, you will gain an immense amount of strength, and when dropped on the ground, the Stone will destroy organic matter around it.

Space Stone
When holding the Space Stone, you will gain a Speed Boost and fall resistance.

Reality Stone
When holding the Reality Stone, you will gain Jump Boost and Slow Falling. Any mobs near you will be launched into the air and any arrows shot will disappear.

Soul Stone.
When holding the Soul Stone, all nearby mobs will be given the glowing effect and you will be given a large amount of regeneration.

Time Stone
When holding the Time Stone, time will begin to rapidly speed up. The days will fly by and any plants will grow quickly.

Mind Stone
The Mind Stone currently has no powers.

To wield the Space Stone, you can wield the Tesseract. First you must craft an empty Tesseract as follows:

LCL
C C
LCL

L=Lapis Block
C=End Crystal.

Throw the empty Tesseract and the Space Stone on the ground together to craft the Tesseract. Placing the Tesseract in your offhand and selecting your first slot will allow you to jump between dimensions. Sneak to select the dimension and right-click to teleport. (DO NOT DO IN SURVIVAL MODE)