Obudadado Monster Mod will add a scary monster, namely the boss.

More Command Block Tools [CWSBP] Addon many command blocks.

Useful Sides Minecraft addon more blocks to your game world.

Fantasy For Minecraft Addon mythical creatures and structures.

Player Zombie Minecraft addon will turn you into a zombie.

Mutated Warden Addon of new warden monsters.

Mythological Craft Addon more bosses, structures, mobs and items.

More Vehicles Addon many new types of vehicles in Minecraft.

Minecraft Corruption - Addon will complicate survival, add a virus for mobs and monsters, everyone can get infected with it and become real monsters.

Dreadlord Scythe Minecraft addon blade, or rather the scythe of death.