i found some figure helping 303, few minutes ago i played minecraft on PC. i made new world, and i found some weirid sightings, there are them:
i spawned at night
signs what says: i will eat you tonight! xD
glowing mobs
some red glowing figures far away
random redstone dust
when you wake up, your house is on fire and it isnt day
ghasts in owerworld
that's it!
i called that figure GLOWING NIGHTMARE