Bound Totems

Right click a totem shelf with a bound totem to put it on the shelf, and right click a totem on a shelf with an empty hand to remove it. A bound totem in any shelf bound to an entity in any dimension can be consumed and will save that entity from death.

Stick a ritual dagger into a totem shelf by right clicking it. The shelf will heat up and when lightning strikes it, if the entity whose blood the dagger is covered in is < 10 meters away, the dagger and shelf will be permanently bound to that entity.

Attack a living entity with a clean ritual dagger to cover it in that entity's blood. Right click with a dagger while sneaking to cover it in your own blood. Bloody daggers can be cleaned in cauldrons for reuse, if desired.

Strip two oak logs by right clicking them, then hold the left mouse button to gradually carve them into a totem shelf frame. Stop carving once four planks have been dropped.

Throw a totem of undying on the ground, then right click it with a bound or bloody ritual dagger to bind that totem to the entity whose blood the dagger is covered in.

Right click the totem shelf frame with each of the four planks to complete construction of the shelf. The shelf can now be broken and picked up as an item, if you wish to reposition or store it.