this datapack add in Elder of The Ender Origin. 

Advantages:

+ enderpearl throw (primary)

+ Personal Vault (Secondary Ability) (Items stays after death)

+ fullbright

+ boost in the end

+ 15 hearts

Disadvantages:

- take water damage (rain and water)
rain damage need to be readded for 1.21.1

- stinky (particle)

- when enderpearl ability is used you get slowness

things that can change/add:

more weakness

balancing