SystemAdditions
SystemAdditions is a magic/exploration mod for Minecraft that significantly expands the game world with new dimensions, biomes, structures, ores, and mobs.
New Dimension: Void World
Enter the Void dimension by falling into the void, usually in the End. This dangerous place is filled with aggressive creatures:
- Void Creepers explode instantly with a massive blast radius
- Void Monsters sneak up unnoticed and perform jump attacks
- Void Beast - the dimension's boss with enormous health and damage
Defeating the Void Beast rewards you with a void gem - the key item for returning to the normal world.
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Void Biomes
Basic Void
The standard biome without special features.
Mushroom Void
Biome with abundant void mushrooms, some containing valuable items at the base and inside the cap.
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Withered Forest
Once a lush green forest that withered from constant exposure to the void. Trees and grass have long died, preserved by the thin atmosphere.
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Lush Void
Amazingly, grass here survives the harsh void climate. This is the rarest of the four biomes.
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New Ores and Materials
Osmium
New metal superior to diamond in characteristics. Generates similarly to gold.
Cobalt
Metal for creating advanced redstone components. Rarity similar to iron.

Void Structures
Void Tower
Exit from the Void dimension. The portal to the normal world is located at the tower's peak. Activate it with a void gem to return home.

Void Temple
Rare structure where you can find strange ice - a new ice variant that significantly accelerates movement on it.

Additions to Main Worlds
Overworld
Added silver, mithril, and aquamarine. Mithril is an extremely rare metal for creating magic cores and powerful charms.
Nether
Sulfur, gold, and phosphorus. Phosphorus burns like coal and is used for making matches and torches. Nether gold ore drops 3 nuggets.

End
Amethyst and enderium. Amethyst will be used for magic in future updates, while enderium has high enchantability.

End Structures
End House
Small structure made of purpur blocks with added purpur glass. Contains numerous diamonds for observant explorers.

Ender Altar
Rare structure with an ender chest and mithril block in the center.

New Overworld Biomes
Cherry Hills
Forest covered with cherry trees. Harvested cherries can be eaten.
Maple Forest
Forest with maple trees. Use a tree tap on logs to collect maple sap.
Enhanced Biomes
Savanna
Added baobab trees that diversify the savanna landscape.
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Technical Features
Blazing Obsidian Tools
Automatically smelt mined blocks and set attacked mobs on fire. Compatible with fortune enchantment, allowing multiple drops from iron and gold ores.
Redstone Blocks
New blocks for controlling time and weather, requiring osmium and cobalt.
Ancient Runes
Alternative item enchanting system. Create runes from silver blocks and use them in a rune enchanter to apply enchantments to tools.
Future Updates
The Etherlands
New dimension in development - world of floating islands with ether fluid that will be used for magical purposes.