Minecraft should have more amulets than the Totem of Undying, and that's pretty easy to get if you find an Illager Mansion or Pillager Patrol. My idea is to have at least 1 amulet for each Dimension. I have 2 ideas so far.
The End Amulet - An end-game item crafted with a Dragon Egg, Dragon Head, a Nether Star, 3 String, and 2 Eyes of Ender. This item has a special attack when you right click, which is summoning a temporary Dragon Head, which bites and does 15 Damage. It also makes your bow shots Shulker Bullets which fly to the nearest entity that is hostile.
The Spelunker's Pickaxe - Destroys 4 blocks at once and smelts any Gold or Iron you mine.
I think that these ideas could be added because Minecraft's amount of magical items is pretty limited, only having the Beacons (Conduit and stuff), Enchanting Tables, Potions, and Totems of undying (I probably forgot a few). Then again, these are extremely overpowered.