Being partially on the Ethereal Plane and partly on the Material Plane, surfaces such as walls and floors mean nothing to a ghost. Using one foot of movement per inch, a Ghost can pass through surfaces no more than 6 inches thick.

+2 WIS, +1 DEX, -1 STR, -1 CON

Starting at 3rd level, Ghosts learn to better control their powers of intangibility. Once per short rest, you can choose to phase through, and take no damage from a nonmagical attack.

Languages that Ghosts know.

Ghosts are not alive, so they do not require rescources to sustain life. Ghosts do not require food, drink, sleep, or any other things that other races need to stay alive. They also cannot be damaged by cold or heat, nor can they drown.

Ghosts can see 30 feet into the Ethereal Plane