Madness Opus

It beckons to me, a being of immense and terrifying power
A portal to a dimension of chaos lies just beyond my window
Hungrily it feeds, eagerly swallowing souls of thousands
I prepare this first movement to combat the unknown
No one must know my secret
I'll take a life to keep it
I cannot rest until this vile demon is defeated
My nightly ritual
A captivated minstrel
This is the madness in which I dwell
Curtains drawn, candles lit, contorted shadows cast
Staring into the maw of the void where infernal incisors endlessly gnash
A blasphemous sonata echoes throughout the halls
Reverberations in the inter-dimensional gateway
The abomination demands an encore
A rhapsodist to this galactic titan enslaved
Cosmic horror beyond infinite time
Entranced by the melodies perverted and sublime
A caprice for the beast
An amorphous entity's malign lullaby