A slime can absorb water up to 20 cubic feet to grow at a rate of 1 foot per cubic foot of water. Outside of combat, this effect can last up to 1 hour and gives advantage on checks and saving throws requiring strength, but gives disadvantage to checks requiring dexterity. In combat, this gives a +2 to strength and a - 2 to dexterity. This effect lasts 5 turns in combat

Slimes are able to absorb impact from falling and disperse it so that they take little to no damage

Once per long rest, a Slime can choose to take a different humanoid form. This form must be no taller than 6 feet unless there is at least 1 cubic foot of water nearby, in which case they can grow up to be 8 feet tall. This form can also be no smaller than 2 feet tall. Slimes can also temporarily shrink down to the size of 3 cubic inches, they can assume this form for no longer than an hour before returning to their most recent humanoid form. If contained during this time, the Slime must make a DC 15 Constitution saving throw. On success, they destroy their container if it is non-magical. On a failure or in the case of magical containment, the slime takes 1d6 bludgeoning damage every hour they spend contained.

Slimes have naturally high physical endurance, granting them a +2 to Constitution.

Slimes are naturally very slippery, granting them a +1 to Dexterity.