Who?

I'm not a funeral
I'm an incinerator
I'm not a card
I'm the game
I'm not an animal
I'm a species
I'm not a map
I'm a journey
I'm not an omen
I'm a prophet
I'm not what you want
I'm what you need
I'm not a question
I'm an answer
I'm not the darkness
I'm the night
I'm not medicine
I'm a cure
I'm not the one
I'm the only one