Corundum Meadows - mod adding new colorful biomes, useful items, more than 16 mobs and one boss, new music disc, new achievements, as well as many decorative blocks. Additionally, it also improves the standard lowland biomes.
New resource. Found in caves about the same rarity as diamonds, but much more common in lowland biomes.
From corundum, you will be able to create a wide variety of useful tools that can be useful to you both in construction and in survival.
In the new meadow biomes, you can meet many new creatures that can become your loyal friend or annoying enemy.