CU and Wave God

Two creatures: CU and the Wave God, with default health 91, armor 78, and attack 67. They do not attack each other; when they meet, they stand still facing each other and play a theme song of about 132 seconds, and they still do not fight when the song ends. They prioritize chasing players, and secondly attack other creatures that come close; when the player enters the Nether or the End, they teleport near the player and continue chasing.

Evolution: After the player is killed by them, the one that dealt the killing blow evolves one level, becoming larger in size and increasing health / attack / armor. At the moment of evolution, it is invincible for a few seconds, up to a maximum of five levels.

Configuration panel: By default, press P to open it. You can change the two creatures' health, armor, attack, attack targets, and music toggle; the configuration is stored in config/splitter_beast.properties, and changes take effect immediately on creatures already spawned in the world.

Infection ground: The CU Block / Wave God Block beneath the creatures infects one ordinary block nearby every 3 seconds. Infected blocks become infection blocks and continue spreading outward, up to 16 blocks from a single source. It only infects solid ordinary blocks, does not touch entity-bearing blocks such as chests, and does not spread within the CU / Wave God dimensions.

Instant tree growth: A whole CU Tree / Wave God Tree grows instantly on infection blocks. Before growing, it checks that the top can see light, that there are no other logs or leaves within 6 blocks, and that the space for the whole tree is empty, so trees will not crowd together and will not grow on walls.

Two dimensions: The CU Dimension "CU Wasteland" and the Wave God Dimension "Wave God Abyss", paved with flat dimension rock and core blocks. Each dimension has three types of structures—obelisks (altars), ruins, and villages—as well as large patches of dimension trees. All three structure types contain chests that can yield crystals, seeds, food, music discs, and equipment.

Blocks: Dimension rock, logs, leaves, saplings, planks, slabs, stairs, torches (can be placed on walls), pixel lamps / tide lamps, infection blocks, and two types of portal blocks.

Equipment: Two sets of crystal equipment, each containing a sword, pickaxe, axe, shovel, hoe, four pieces of armor, a shield, and a trident. The shield has 4096 durability; the trident deals about 62 melee damage, has 3072 durability, and can be charged and thrown. Wearing all four armor pieces of the same family activates the set bonus: the CU set grants Resistance, Absorption, and Haste; the Wave God set grants Water Breathing, Dolphin's Grace, and Regeneration.

Food: 13 kinds of dishes, each with different recipes, respectively granting buffs such as Speed, Night Vision, Resistance, Absorption, healing, and Water Breathing; there are also two fruits, Pixel Fruit and Tide Berry, which can be eaten directly.

Other: A music disc recording the "Song of Encounter", dimension fire seeds, purification powder, and 12 advancements.