Pseudopod

_Melee Weapon Attack:_ +3 to hit, reach 10 ft., one target. _Hit:_ 3 (1d4+1) bludgeoning damage plus 7 (2d6) acid damage, and if the target is wearing nonmagical metal armor, the armor is partly corroded and takes a permanent and cumulative -1 penalty to the AC it offers. Armor reduced to an AC of 10 is destroyed.