Any metal object that touches the gray ooze, whether in the case of attacking the ooze with it or the ooze attacking you, takes a permanent and cumulative -1 penalty to the damage it deals or AC ...

One of the best new monsters in the 2025 Monster Manual for low-level combat is the Psychic Gray Ooze, a predatory and corrosive slime that searches to consume its next victims. This monster is ...