Circle of the Deeps

Druid Level        Features
2                      Oceanborn, Crushing Pressure
6                       Pearl-Diving Charm
10                     Where Eyeless Things Dwell
14                     Davy Jones’s Locker

Oceanborne

Starting at 2 level, you have resistance to cold, you have a swimming speed equal to your walking speed, and you can breathe water. If you normally breathe water, you gain the ability to breathe air instead, and you gain a walking speed equal to your swimming speed. You can withstand pressure to a depth of 1,000 feet per druid level.

When you use your Wild Shape feature, you can transform into the shape of a beast with a swimming speed. Starting at 8 level, you can choose the shape of a beast with a swimming speed and a challenge rating of up to 2.

With noises and gestures, you can communicate simple ideas with Small or smaller beasts that have a swimming speed.

Crushing Pressure

At 2 level, you wield the crushing pressure of the depths. When you hit a creature with a spell attack or a creature fails a saving throw against a spell you cast, you can spend your bonus action to knock the target prone, and its speed is halved until the beginning of your next turn. You can use this feature a number of times equal to your Wisdom modifier (minimum 1), and you regain all expended uses when you finish a long rest.

Pearl-Diving Charm

Beginning at 6 level, you can help other people venture into the depths. Creatures affected by a water breathing spell that you cast also gain resistance to cold damage, a swimming speed equal to their walking speed, and the ability to withstand pressure to a depth of 6,000 feet. Water breathing spells that you cast can’t be dispelled by anyone other than you, and you gain water breathing as an extra prepared spell.

Water breathing spells that you cast can’t be dispelled by anyone other than you

Starting at 10 level, you gain blindsight out to a range of 60 feet.

Furthermore, you can communicate telepathically with any creature you can see within 120 feet. You don’t need to share a language with the creature for it to understand your telepathic messages, but the creature must be able to speak at least one language.

Davy Jones’s Locker

Beginning at 14 level, when you knock a creature prone with your Crushing Pressure feature, you can also force the target to roll a Constitution saving throw. The target suffers 5d10 cold damage and is restrained for 1 minute on a failed saving throw; on a success, it suffers half damage and is not restrained. At the end of each of its turns, the target can attempt a new saving throw; on a success, it is no longer restrained. You can use this part of this feature once, and regain the use of it when you finish a long rest.

Furthermore, you regain all expended uses of Crushing Pressure when you finish a short or long rest.