Excalibur_BWG_0.1_1.21.4.zip is a release file of the Minecraft resource pack Excalibur | Oh The Biomes We've Gone Support, made for Minecraft 1.21.4. It was published on December 29, 2025 and is 0.7 MB in size. For the full description, screenshots and every other version, visit the Excalibur | Oh The Biomes We've Gone Support resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.