Sahuagin's Prowess

You have developed traits similar to that of a sahuagin, granting you the following benefits:

• You gain a swimming speed equal to your walking speed.
• You can cast the animal friendship spell at will. When you cast it in this way, you can only target sharks with it. The spell’s spellcasting ability is Intelligence, Wisdom, or Charisma when you cast it with this feat (choose when you gain the feat).
• Once per turn, when you make an attack against a creature that has fewer than half of its hit points remaining, you can make the attack roll with advantage. When you make an attack roll against a creature that has fewer than a quarter of its hit points remaining, you make the attack roll with advantage.