The sun, however it's actively censored before your eyes by a black square no matter what. It's just the sun. The grass is dying from dehydration as the trees loose their leaves and become sticks. It's the sun. It's an end-of-life scenario, only for 1 day. Also it is extremely BRIGHT and SHADE keeps you alive. also the sun flickers light like a bad tv. If youre in its rays youre forced to look at the sun. THE SUN MELTS AND KILLS YOU IN CHUNKS IF YOU STAND IN IT AT ALL. SHADE IS KEY.