I was hailed as a God, though that is what I am not. I exist within a friend, but not for long, with my end, new ones are born. I give mass to those without. What am I?

I look like my twin, though we can never meet. When we finally touch, we vanish in a flash of light and heat. I'm the rarest thing on the planet, but I'm not found there, you'll find me in the places between spaces. What am I?

i come in many forms yet never change.I spark many ideas yet stay the same.

I’m something you cannot ever win, A battle of thought that lies within. No board, no dice, no coin is tossed... As soon as you think of it, you have already lost.

I am an odd one, but if you take a letter from me, I'll be even.