Minecraft mod for 1.21.11 which features QOL for Blaze Slayer giving you a HUD with general information about the current boss.
blazeQOL
Setup
Use command /display on to enable the features or /display off to disable them.
Features
A HUD in the middle of the screen showing you name, health and attunement of the Blaze Slayer boss with the indicator whether Twilight Arrow Poison has been used in a range of 8 blocks from the player.
Example: 
Requirements
minecraft version 1.21.11
loader version 0.19.1 (fabric)
fabric api version 0.141.3+1.21.11
Originally made by Harmfool for 1.8.9
External resources
Project members
majcherczak
Member
Technical information
License
ARR
Client side
required
Server side
unsupported
Project ID