Dimensional Shackles of Oppression: Once a day, the holder of the key of the Shackles of Possession may give the shackles a simple order (such as “attack anyone who enters this room” or “follow and protect me”). The shackles will force their prisoner to follow the order. While actively following orders, the subject is Dominated and is not immobilized or restrained. Whenever action is not necessary to follow the order, the subject is not Dominated and is again immobilized and restrained.

A second order in the same day will have no effect.

If the subject is bloodied or forced to do something against his nature, he gets a saving throw. If he is successful, he cannot be Dominated for the rest of the day.

Devils often use Shackles of Oppression to force their captives to defend their lairs. Many devils are protected by shackled and despairing unicorns, heroes, and even good angels.

Dimensional Shackles Forged in Life: If someone is wearing these shackles while they die, their ghost cannot leave the world until someone removes the shackles from the body. The ghost cannot stray far from its body, and, with the right ritual, may be questioned. It’s easier to resurrect someone whose spirit is trapped by the Shackles Forged in Life.

Dimensional Shackle Jewelry: The shackle looks like normal ring or necklace: its wearer is unaware of it and cannot remove it (though others can). When the captor puts it on, they can give the victim a one-sentence restriction: for instance “don’t tell anyone about the murder”, “don’t pick up any weapons”, “don’t wear that ugly hat”. The victim will follow the restriction. Victims with a Wisdom less than 13 will not be aware of the restriction: those with a high wisdom will be aware that something is modifying their behavior, but they will not know what it is.

Raven Feather Boat: if a dead person is put at the helm and the boat is sent adrift down a river, it will, after several hours, take all inhabitants to the shadowfell.

This feather boat’s power is discovered only when the PCs find the one black feather on the swan boat’s body.

Feather Boat of the Northern Mists: While the feather boat is in motion, the boat’s steersman may use a minor action to render the boat and all its passengers invisible. If the boat stops, or any of the boat’s occupants make an attack, it becomes visible for the next five minutes.

The northern barbarians know the secret test which must be performed to unlock this special power.

Swanmay boat: Besides a feather token and a boat, the token can also take on its true form once a day for up to an hour: a swanmay, a fey woman with swan wings. The swanmay can fly, has defenses of 26, and, if hit, returns to token form. In swanmay form, the token is under no obligation to follow orders, but may help the PCs if she trusts them. In swanmay or boat form, this token can speak elven and common.

The boat’s swanmay form is discovered only when the swanmay first chooses to show herself.

It’s hard to say what unique conceptual space Heward’s Handy Haversack occupies: it’s like a bag of holding but… on your back? Its main schtick seems to be that it’s more convenient. The level-up powers I assigned to the Haversack mostly have to do with convenience, although the bag and pack powers are pretty much interchangeable.

Jedd the Hunter’s Handy Haversack You can put one medium or small person inside Jedd’s haversack: they must be dead, helpless or willing. If they are Dead, the sack acts like a ritual of restful repose. if living, they will be put in suspended animation until they are removed from the haversack. A suspended creature will occasionally become conscious, and if not otherwise restrained, can make a Hard escape check once per day.

A willing subject may ride around in the backpack with just his head sticking out, giving helpful advice like “Look behind you!”

Handy Haversack Familiar
This sentient haversack is loyal to its master. It may deny others access (opening it against its will requires a DC 22 strength check), or open to reveal a normal, empty bag interior. Once per turn, it may, unaided, either drop one of its items, or pick up an item in its square. It may also move, with a movement speed of 4, although it will generally not do this if observed by anyone but its owner.

Handy Haversack of Useful Items
Once per day, the Handy Haversack can produce an item that was never put into it. It can produce any item from the PHB1 equipment list, that is small enough to be removed and that has a price of less than 50 gp. The produced item will disappear at the end of the next extended rest.

In AD&D, where your treasure haul is limited by encumbrance, you need a way to increase encumbrance limits along with treasure hauls. Therefore there are 4 types of bags of holding in the AD&D DMG, with capacities of 250, 500, 1000, and 1500 pounds. In 4e, there is no assumption that weight limits for treasure will be a regular part of gameplay. Therefore, bags of holding need some other, more 4e-friendly ways to level up.

Pockets of Holding This bag of holding can be cut according to a specific eldritch pattern and sewn as pockets into six garments. Each pocket allows access to the same shared bag of holding.

The Pockets of Holding pattern was invented by an honorable adventuring party who wanted to share their healing potions, but later misused by a band of dwarven thieves who discovered their shoplifting applications.

Self-Holding Bag: The bag of holding-boosting ritual from Dragon 385 could as easily be a leveled magic item. This bag can be hidden in or removed from an extradimensional space as a minor action.

Seleris the Magician’s Bag of Holding
If you put one hand in the bag of holding (a minor action) you can transfer items from your other hand to the bag and vice versa as a free action.

Seleris the Magician used to put one hand in his pocket while doing conjuring tricks with his other hand. Due to his Bag of Holding and other magical trinkets, he developed a great reputation as a wizard without ever learning a single spell.