Diablos?

came from a childs toy > Game
a breath of wind to give me life>Blizzard entertainment?

I decide who lives and dies
bringing men to valhalla

From the break of day
to the eastern archeopaligo

I choose the man who leads the masses>he chose Squall who's the commander
i serve the role of counselor

I can even grant your deepest desire>came from a genie's lamp

what am I?