REQUIRES A DEDICATED RESOURCE PACK: {Link}
This data pack is based on and functionally reminiscent to the Boss Rifts mod by jodlodi and all ideas that went into this data pack should be credited to that mod's author. When used on the NeoForge modloader, it adjusts to the same compatibilities as is supported by the Boss Rifts — Compat+ mod. However I'd highly recommend using Boss Rifts along with the aforementioned Compat+ addon for that instead.
Boss warps is a data pack that allows warp points to generate at the location of a boss entity proceeding its defeat. It is advisable to keep a distance after vanquishing your adversary however, as the animation that plays before generating the warp point will end in a bang. Right-clicking on the warp point will play a little animation before transporting all proximate entities around the spawn location of the player that activated it. Any entities that will be transported by the warp point will be indicated by beams linked to the warp point during the warping animation. Be warned however, for it is also important to note that the warp points cannot exist eternally and will disappear if it sticks around for a given amount of time (around 4000 in-game ticks which is equivalent to 3 minutes and 20 seconds), by which point it will play another animation before going off with another little bang, vanishing for good.
This data pack will automatically support bosses that use the #forge:bosses, #c:bosses or #bosswarps:spawns_warp entity tags. However, given how few bosses in the modding ecosystem actually register their bosses under these entity tags, the data pack automatically provides its own branch of support for numerous bosses in the versions of Minecraft this data pack's available to play in by registering them under the #bosswarps:spawns_warp tag or through datapack-based code. This also includes vanilla's Elder Guardian (although all three in a monument have to be slain before a warp point can spawn). That being said, the data pack doesn't mandate the installation of every listed mod within each version simultaneously; rather, it adjusts to functionally accommodate the ones that are currently installed.
The primary criteria for enforced boss support from this data pack is if the boss is only summonable in specific locations as opposed to anywhere. There is no point of supporting a boss that you can summon in your backyard, such as the vanilla's Wither. However, the data pack can sometimes, albeit quite rarely for balance purposes (even more so with mini-bosses, though more frequently with bosses that spawn naturally in a different dimension than the overworld), include bosses that spawn via natural conditions as players may encounter them in the wild while venturing out miles upon miles away from home.
The lists shown below detail what mods and their respective bosses are supported by this data pack manually.
1.21(.1)