At the beginning of the multiverse the first two things created were a being of darkness and destruction (on the left) and a Crystal of creation and light (on the right)
However the crystal was moving with the flow of time, eventually being swept into a fairly average universe (not much different from our own) when a man who's name has been lost to time picked up the crystal. It had found it's user, and the moment his hand touched the crystal, the being of darkness was weakened and put into a far less... Threatening form
Eventually he created a nearly indestructible suit made with many materials from across the multiverse. However eventually it was swapped out for beastium after his battle with zanthor more specifically a combination of vibranium and beastium because of vibraniums ability to absorb impacts and release the energy in a focused blast when used correctly (like black Panthers suit)
Also yes I remember I said the collector is not immortal and here I said he can give himself any power. Here's my explanation
DO YOU THINK HE DIDN'T TRY THAT
Of course he tried to make himself immortal
As I said it requires quite a lot of concentration but that type of power would require use of 100 percent of the mind which the human body cannot handle