Tongue of Grung

You have searched deep within yourself and unleashed your true amphibious power! You gain several new abilities:

• You can use your muscular tongue as a natural weapon. This weapon uses your strength modifier and does 1d4 bludgeoning damage.
• When you grapple a target you can instead wrap your tongue around it freeing up your hands to perform other tasks. 
• You can launch your tongue out at a target within 15 feet of you. The target must make a dexterity(acrobatics) check contested by your strength(athletics) check or be grappled and pulled 10 feet towards you.

The Grung may use this ability as a bonus action a number of times equal to your proficiency bonus; you can regain all uses after a long rest. At level 5 this ability does 1d6 bludgeoning damage and may be used a number of times equal to your proficiency bonus plus your strength modifier.

Note: the tongue of grung does not poison a creature. It does however benefit as a whip and gain the weapon mastery property Slow when proficient with whips.