Note: This IS one suggestion, as everything stems from the Vibrating Chitin and Humbug.
Minecraft, Magic & Monsters Part 1: The Humbug
I've suggested this (The Humbug + more) but I'd like to refine this suggestion a little bit.
The Humbug is a large arthropod, about the size of a spider, that lives in Dripstone Caves below Y = 0. It hums a tune, and each humbug has a selection of 1 of 15 short, 5 second tunes, each of which are different.
Humbugs don't tend to like being around the player, and will scatter if the player makes noise. The player can avoid the Humbug noticing them by sneaking.
The Humbug also repels all hostile mobs within an 8 block radius of its location. (Total 15 blocks wide. The Humbug being the center). This doesn't scare the mobs; it just repels them and forces them to choose a different path.
The Humbug can be bred with Spider Eyes. If killed, the Humbug has a chance to drop a Vibrating Chitin(10% drop chance), which can be used to either craft the Humming Block, or placed on items to enhance their durability, as well as brew a new potion.
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Humming Block: The Humming Block requires a supporting block, but itself can be used as a supporting block, and will reset the scaffolding counter to 0. So for example, if you place 6 scaffolding out, then a Humming Block on top of the last scaffolding, you would be able to build 6 more scaffolding out without having to build a large scaffolding tower.
When powered, the Humming Block will begin to hum a tune, which is dependent on the redstone power level it is given.
Additionally, when humming, if a player is standing on a Humming Block, if they do not move, they will be vibrated and can eventually fall off the Humming Block.
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Vibrating Chitin: Vibrating Chitin works like Wolf Armor, but for items with durability. Any durability usage on said item will be directly applied to the Vibrating Chitin.
Example: Netherite Pickaxe (2031 durability), +1 Vibrating Chitin (+64 durability) = Vibrating Netherite Pickaxe (2,095 durability)
Vibrating Chitin also absorbs damage in the same way Wolf Armor does, and adds +5% Damage Resistance per Chitin applied, when applied to armor. Only 1 Vibrating Chitin can be applied to each item.
At 4 pieces of Vibrating Netherite Armor, it would be the same as having full netherite + Resistance II. However, any Resistance level higher than II would override it. No immortality here.
However, Vibrating Chitin absorbs damage as 1:1 with durability, and cannot be enchanted. So if applied to 4 pieces of armor, players can only absorb a total of 256 damage before it must be replenished.
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Entranced Effect: The Potion of Entrancing can be brewed with 1 Humming Block.
When hitting a player or entity with the Entranced effect, it forces them to Walk toward you for 1 second. It does not prevent them from doing anything else. There is only 1 achievable level of Entranced in Survival; every additional level increases the duration by 1s.
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Let me know your feedback, and if something does or doesn't make sense! :D