Stalwart Dungeons
Stalwart Dungeons is a modification created specifically for the MCreaModRacing competition organized by BricoGeek and Doo89. The competition theme was dedicated to bosses and dungeons, which determined the development direction.
The mod adds three new dungeons to different Minecraft dimensions. Two structures appear in the Nether: The Awful Dungeon (found in Soul Sand Valley and Warped Forest biomes) and The Keeping Castle (located in Nether Wastes and Crimson Forest). A special dungeon can also be found in the End (appears in Void and Midlands biomes).

The mod includes various types of hammers: wooden, stone, iron, gold, diamond, and tungsten. These weapons are effective in close combat and can be enchanted to summon lightning (when crouching and hitting with the hammer).
The Awful Dungeon

The Awful Dungeon is home to unique fauna. Here you can encounter Incomplete Withers - wither skeletons that have been on soul sand for a long time and absorbed its power, increasing their chance of dropping skulls. Also found here are Reinforced Blazes - creatures covered in an alloy of basalt and their own skin, making them extremely durable but slow.

The main boss of this dungeon is the Awful Ghast, the result of dark experiments. To awaken it, you need to place a Nether Star on a special altar. The battle occurs in two phases: first, it attacks from a distance with projectiles that temporarily make items in hands useless and set the player on fire, then it switches to close combat, dealing massive damage. After victory, it drops Awful Crystals and an Awful Weapon.
This dungeon yields a new ore - tungsten, used to create tools and armor that protect against wither and burning effects.

The dungeon is filled with various traps. Igniters set fire to entities passing over them and apply a burning effect. Pushers throw back mobs and items, which can be used for transportation or creating automated farms in the Nether where water is unavailable.
The Keeping Castle

In The Keeping Castle, the environment is quite sterile, and few species can survive here. Inanimate statues can come to life when a player approaches, turning into Giddy Blazes.

The main boss is the Nether Keeper. To activate it, a Nether Star on the altar is also required. At close range, it infects the player with spores, deals significant damage, and summons allies when it loses half its health. After victory, it drops Ancient Fire, which can be used to smelt items in the offhand and create the Nether Hammer (melts mined ores).

The castle features a new block - the Spore Vaporizer, which spreads a cloud of spores that infect mobs. Spores can be collected in glass bottles for use against other creatures. When the effect ends, mobs are encased in a nether wart cocoon. Tungsten armor can be infused with spores for immunity to this effect.

Castle rooms are separated by strange doors made of Transient Blocks that can be activated manually or with redstone - they disappear and reappear after a few seconds.
The End Dungeon

The End Dungeon is home to one creature - the Propulk, a flying mutated shulker resembling a drone that shoots levitation projectiles.

The main boss is the Shelterer. To awaken it, a Nether Star on the altar is needed. It can lock itself in an energetic shulker box, becoming invulnerable. The only way to deal damage is through explosions (TNT, bed, or Shulker Cannon). After victory, it drops 4 Void Crystals.

The dungeon features several ways to damage the boss: the Obsidian Striker (sends an explosion 9 blocks upward) and the Shulker Cannon (sends TNT in the direction the player is looking). To access the upper areas of the structure, the Shruster is used to launch entities into the air.

Here, a new ore is mined - Chorundum, used to create tools and armor that protect against levitation effects.

Using Void Crystals, you can create a Teleporter Block that saves a position with the Teleporter Core. If a player crouches on the Teleporter Block with an installed Core, they will be transported to the marked coordinates.