Black Dragon Mutation

Your flesh carries the reek of rot and acid, and your presence warps the land around you.

• You gain resistance to acid damage. In addition, you can breathe air and water, and you ignore difficult terrain caused by mud, swamps, or shallow water.

• Acidic Scales: When you deal acid damage to a creature, that creature takes acid damage equal to your proficiency bonus at the start of its next turn. If the creature is prone, restrained, or grappled when this damage is dealt, it also has disadvantage on the next saving throw it makes before the end of that turn.