I'm going to go out on a limb here and conjecture a bit.
Wait until you get the first "Your world is being Invaded" message while playing online. You'll shit your pants and run around like a wuss the first time it happens, trying to find where the hell is the black phantom coming from. Then he sneaks from behind and back-stabs you xD.
Anyway, congrats on getting Demon's Souls. My favourite game of this generation so far 
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"
