Necromancy 2.0

This is a sequel to my previous datapack, reworking all of the features in many ways.

  To start your journey, kill a phantom. This will unlock a new item, the Staff of the Dead.
  Holding the Staff will summon a Ghost Trader with 3 trades. It will take 8 phantom membrane for 8 diamonds, 32 for a Necromancer's Blade, and 16 for a Bucket of Eternal Life.
  The Bucket will grant immunity to fall damage while you hold it. The Blade has smite 7 and will give 1 Undead Fury upon killing an enemy. This consumable item gives a strength and speed boost, but has a chance of giving nausea too.

Tested in 1.21.1