DV Science of Souls

• Soul Jar: right-click a creature to catch its soul (bosses excepted), right-click a block to release it — name, health and gear included
• Binding Altar: lay a creature's jar on it and offer a soul with half its hearts: it stands up as your pet. Pets follow, wait or wander (sneak + right-click), defend you, and never turn on you or your other pets — monsters too
• Soul Collar: a collared pet that dies leaves a collar shard; offer a soul as strong as it at the Soul Altar to bring it back
• Soul Fuser: fuse two souls into a hybrid — Woolly Cow (shear it, it grazes its wool back), Feathered Pig (lays eggs, falls slowly), Lava Horse (walks on lava), Wolf Fox (fetches items) — or two of the same kind into a stronger soul
• Soul Furnace, Soul Smoker, Soul Blast Furnace: twice as fast as the game's own, burning souls from a bar at their side; with DV Backpack they also come as upgrade cards that cook inside the backpack
• Soul bars and pure soul: every soul machine burns souls from a bar at its side (one heart is one soul), filled from the slot under it with a soul jar or a bucket or bottle of pure soul, or by pipes. The Soul Refiner draws a jarred soul out heart by heart, with a little amethyst (one shard every 8 souls) that cracks as it wears, into pure soul (take the jar out halfway and the creature keeps the hearts it has left): a dark blue liquid with soul faces drifting in it, belonging to no creature. A bucket of it burns in any furnace, a bottle soaks coal into Soul Coal, and it is the safe offering at the altars
• Corruption: offer a soul of another kind for a creature (bringing back, binding) and it may turn into a corrupted one: its own shape, darkened, red-eyed and hostile. Pure soul or the creature's own kind never corrupts
• Feed a soul to a horse to raise its speed, jump and health
• Soul cards: make glass test tubes (two glass and a quartz, four at a time); the Soul Distiller drips a soul's essence through amethyst into one, and soul tubes stand in the rack of a gold, diamond or netherite soul card (1, 2 or 3). In a worn DV Backpack's upgrade slot it gives the creatures' powers: water breathing, night vision, wall climbing, walking on lava, strength, speed, creepers keeping away, item magnet... 18 in all; more essences of one creature make it stronger
• JEI shows the fusions, distilling and refining; works without JEI and DV Backpack (cards then work from the inventory)
• Server settings for costs, times and limits
• Required on both client and server

Part of Darkvolfi's DV mods: small, focused quality-of-life mods that share one library (DV Lib). Every DV mod adds its settings and key bindings to the DV button on the title screen and pause menu. Written from scratch; no code from other mods.