4 skill (dodge) is broken, its effect does not disappear and is stacked, which allows you to make the dodge chance 100% at the very beginning of the game (although for some reason the bug works crookedly and at a certain point the ghosts can start to cause damage, but this is solved by re-using the 4 skill). The only one who can hit you in this case is the turquoise ghost, since you can dodge his double attack only by clearly hitting the timing of dodging the first attack before the opportunity to dodge the second attack appears, or if his double attack requires the same dodges. Although considering that the turquoise ghost cannot even link (only if he lowers all health to zero), this is not a serious problem.