Minecraft

you need to build up 8 blocks and your going to need loads of wind charge i used a launcher for this achievement

For obtaining this achievement and "Revaulting" I'd suggest using ChunkBase (https://www.chunkbase.com/) for your current seed to know where the closest Trial Chamber is in new chunks loaded within this update or within a new world entirely.

While inside a Trial Chamber there will be Breeze mobs that will spawn around the trial spawners, they will jump around but are easy enough to kill. Once you kill the Breeze mob you'll obtain the breeze rods.

Using breeze rods inside of a crafting table you can craft the wind charge, using the wind charge and jumping at the same time will give you an 8 block jump boost and unlock the achievement.

Hope that helps :)