New Substance - Lime

Lime (could be called something else to reduce confusion with lime dye) will be a key ingredient in new limestone blocks, these being as strong as blast resistant as end stone but need a wider range of materials to make in a shapeless recipe (looking for ideas), limestone will be comparable colour to end stone but paler, could serve as a more readily available and durable material for early game pvp as well as being resistant to creeper damage

limestone could be found near deserts or plains bordering warm ocean, it forming under the clay and gravel and sand, but always above deepslate
lime could function as its own liquid, operating similar to powder snow, could be bottleable for use in splash bottles of lime (a cheap way to make blindness potions), the splash bottles could also be used to whitewash many blocks, the affected side of the block being stained a pale colour until broken or the face affected is punched or right clicked or hit by a projectile

lime could add to pvp alot with other options for defensive buildings besides the ugly obsidian bunkers, with the whitewashing feature potentially involving other colours from things like copper and gold it can give the pvp side of things some love and add to customisability