Amphibious Toxins (Frogfolk)

Your natural bodily poisons become more pronounced, giving you the following benefits.

• Your Constitution score increases by 1
• You gain resistance to poison damage
• Once per turn as part of the action you take to make a grapple check or unarmed attack, you can force the target to make a Constitution saving throw equal to 8 + your proficiency bonus + your Constitution modifier, taking 2d4 poison damage on a failure. This damage increases by 1d4 when you reach 5th level (3d4), 11th level (4d4), and 17th level (5d4). You can use this trait a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.