Minecraft wiki entry for Best_biomes_for_homes, associated text: The frequent lava pools are a constant threat, and the jagged terrain can make them hard to spot beyond ridges or in small holes.
There is no food to be found in this biome. The player will need to bring food from another biome.
Magma cubes, while slow, are a dangerous mob due to their large hitbox to deal damage with when they leap onto the player, as well as their ability to split into smaller and weaker, but numerous, duplicates upon death.