Minor detail: Tony Stark from Iron Man (2008) also appears in The Avengers (2012)

Don't say another Goddamn word. Up until now, I've been polite. If you say ANYTHING else - ONE word - I will kill myself. And when my tainted spirit finds its destination, I will topple the Master of that dark place. From my black throne, I will lash together a machine of bone and blood, and fueled by my hatred for you this Fear Engine will bore a hole between this world and that one. When it begins, you will hear the sound of children screaming -as though from a great distance. A smoking orb of NOTHING will grow above your bed, and from it will emerge a thousand starving crows. As I slip through the widening maw in my new form, you will catch only a glimpse of my radiance before you are incinerated. Then, as tears of bubbling pitch stream down my face, my dark world will begin. I will open one of my six mouths, and I will sing the song that ends the Earth.

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