Riddle Me This. #4

[center][c=665D00][big]In a play that so few dare to tread,[/big][/c]
[c=665D00]Lies a story shrouded in [/c][c=7700B2][b]mystery[/c] [c=BF0080]and [/c][c=800000]dread[/b][/c].
[c=A69800]The first act paints you pictures oh so clear,
Of a world long gone,[/c] [c=804600]but oh so dear.
[/c]
[c=7700B2]Yet the second act, the shadows grow,
And twisted visions begin to flow.[/c]
[c=BF0080]Your mind, it spirals far[/c] [c=BF0000]out of control,[/c]
[c=BF0080]With each word taking a[/c] [c=BF0000]darker toll.[/c]

[c=800000]But be warned, for the third act [i]lies in wait[/i],[/c]
[c=A69800]A trap for the[/c] [c=BF0000]unwary[/c][c=A69800], it [/c][c=BF0000][big]seals your fate[/big][/c].
[c=A69800]It leads you down a path of[/c] [c=BF6900]madness and fear[/c],
[c=A69800]A descent into a [/c][c=665D00]horrible world[/c][c=BF6900] so[/c] [c=BF6900]unclear[/c].

[i][c=A69800]So take heed, my friend, and be careful in kind,[/c]
[c=A69800]For the play that I speak of, it messes with your[/c] [c=800000]mind[/c][c=A69800].[/c][/center][/i]

[big][center][i]What Am I?[/i][/center][/big]


[center][c=359E00]Four hours have passed, without a solution so true,
A large clue I'll provide, to help you get through.
The story I reference is from a[/c] [c=665D00]Lovecraftian tale,
[/c][c=665D00]The story, a madness that'll leave you pale.[/c][/center]