Manannans have these basic fey powers:

• Most faeries can vanish and become insubstantial by speaking their True Name into a mirror.
• A circle of salt will protect a faerie from supernatural powers for as long as it goes undisturbed.
• Any fey being may summon a faeriesteed or cheval mallet (seelie or unseelie court respectively) by whistling three special notes.

When a manannan captures a fey, one of these things happens:

• Fey of any Court are ransomed back to their Court. If no ransom is paid, they are forced to serve the Hunt for seven years, then released but marked. If they are caught seven times, they are killed.
• Other vaettir captured by the Hunt are imprisoned and offered a chance to be part of the Hunt. If they refuse, they are cursed.
• Non-fey Aeonians captured by the Hunt are captured and ransomed back to their Court. If the ransom is not paid, the Aeonian is cursed or killed.
• Orphaned or runaway children are taken by them to be raised and protected in secret.

Manannans have the power to imbue certain objects with specific powers only when they are using them. A currach or coracle (a small boat, called a squaba tuinne in their tongue) self-navigates when they are on it. If they drive a chariot, it can go over sea or land. A goblet filled with fresh water will require truth from whomsoever drinks from it.

A drab coat on a manannan will make them able to trade places with another when they are in mortal danger; a cloak will make them easily forgotten--and will allow them to enter a home uninvited and unseen. Either will make them able to escape with great speed, but if they choose to run, a great noise will arise.

A group of manannans wearing cloaks will surround themselves and their communities with mists and become invisible. Senescence, disease, death, decay, and deceptions are impossible in their communities so long as the mists hold, though manannans still die of old age. If their communities are under attack, they can make single boats or guards look like many, moving and alive, even if they are just mannequins or sedges.

Some objects empower manannans. Shoes (called brogues) that are soaking wet give them greater endurance and speed than a horse. A helmet (cathbarr or cennbhearr) with two precious gems in front and one in back will allow them to see behind themselves. Wearing pearls make them beautiful, but after this, if they take them off, they will be seen as hideous and shunned. Only being cared for in spite of their supernatural appearance will bring back their old appearance.

Manannans are skilled with prestidigitation. If they use their skills to perform, they can do something impossible: drawing a living mortal from a small bag, pulling a thread that can attach to a cloud and give those tied to it the power to walk on clouds, or remove someone's head and put it back on (backwards or forewards). They are also skilled harpists who can make people (even those in great pain) sleep or make them fight each other to the death in confusion and rage.

They are outraged by being ridiculed or by bad music and will attack their mockers or bad musicians; during this fight, any blow struck against them will strike the attacker instead. However, after their outrage ends, those harmed during the attack will be healed.

An unwed manannan woman can kill a dragon with her bare hands and heal battered women with a kiss. She can also live underwater. A married manannan man can predict his descendants (including those fostered or adopted) for seven generations if he truly loves his spouse. Both can predict the weather.

If a manannan takes the head of their enemy and plants it at the fork of a river, a poisoned, withered hazel tree will grow there. A shield (a shield of finn) made from the wood of this tree (in a convex shape) will repel esoteric energies, but anyone who tries to uproot or feel the tree will be struck blind. Any manannan who has buried the head of their enemy in this way will have the power to speak to the dead.

During the Hunt, their swords strike killing blows no matter what, rendering their opponents too weak to defend themselves. Their swords also allow them counter attacks if they are struck by another's sword. During their Hunt, armor (luirech) that has a scabal (neck-piece)makes them impervious to piercing weapons; without the neck-piece, their armor is mundane. Any horse ridden by a manannan during the Hunt, that horse will be bonded to them and will not allow another to ride. They have 24 arrows during the Hunt that will capture 24 targets; they carry three javelins made of holly and scorched on the ends for those who have insulted musicians or poets with bad pay or abuse.

If they die during the Hunt, a great stone pillar rises where they fell.

After the Hunt, they butcher pigs (mucca mhannanain) that can feed many times the amount a single pig should be able to feed. This feast, Goibniu, could grant eternal youth to one who could eat a whole pig.

When all of the Hunts come together for the Great Wild Hunt, they answer to the inmortal Master of the Wild Hunt (at present, the Erlking). This happens every seven years. The united Hunt is chaotic. All national, social, and cultural boundaries dissolve as the Hunt rides out throughout all of Lyrilla to take fey, vaettir, and mortals who have violated The Law of the Hunt, an ancient law about when, where, and why one must hunt, but which has implications beyond the mere act of hunting. The seven parts of The Law of the Hunt are

1. Never kill the fertile prey nor children, for there must be prey next season
2. Hunt only during the season, for the prey are vulnerable outside of the season
3. Use all parts of the prey when possible
4. Aim to kill with as little pain for the prey as possible; if an error is made, fix it
5. Be mindful of what you are targeting; carelessness is murder
6. Take care of your hunting gear, for flawed fear can cause unnecessary harm
7. Share the bounty of your hunt

This can be taken metaphorically, however. For instance, a police officer who makes a wrongful arrest (5), a lord who is too stingy (7), a wasteful farmer (3), a builder whose materials are not good enough (6), etc. will be likely prey.

Those captured during these Hunts belong to the Master of the Wild Hunt alone. The Master will decide their fate. The role of the manannans in the Hunt is to be the silent, invisible force in the mists that catches anyone who gets past the rest of the Hunt.