Where to farm ancient debris in Minecraft

Ancient debris can generate anywhere between height levels 0 to 128. Even though it can be found at all heights, finding them above Y level 22 

While searching for ancient debris, players should also consider biomes before starting mining 

Nether waste, crimson, and warped forests are the best biomes for mining ancient debris. These biomes are made up of netherrack blocks

Ancient debris in Minecraft can be instantly mined with an efficiency enchanted pickaxe