Ported the mod to 1.21.11
Additions
Added Veradexian Ruins structure; an uncommon structure made of a cluster of ruins, generating all across The Aether
Added Veradexian Library structure; a rare variant of the Veradexian Ruins with a hidden library in the basement. This structure is exclusive to dense forest biomes (Both Veradexian Ruins and Library come in a temperate and an arctic variant to adjust the structure's block palette to the arctic environments)
Added Irradiated Bunker Remnants structure; a structure exclusive to the irradiated biomes consisting out of 1-2 bunkers ruins
Added Irradiated Settlement Remnants structure; another irradiated theme exclusive structure
Added Animal Den structure, a small den structure generating inside forests. The den is currently uninhabited but this will change in the future
Added Skyroot Barrel
Added Holystone Smoker
Added Aether Shelf variants
Added Veradexian Vase; a vanilla like decorated pot block with unique visuals
Added Animal Stash block; a chest like container with a different model that will retain its open state when opened once
Added Ice Pendant; an accessory that temporarily freezes liquid blocks when stepped above
Added Charm of Reach I; a new tool charm that will increase a player's block interaction range
Added a config for enabling experimental dungeon content
Implemented a working world gen continentalness value that will later be used by the expanse biome
Changes
Made magnetic biomes more common
Gave magnetic biomes a unique terrain generation
Microbiomes will occur less often now
Slightly tweaked generation rates of existing structures
Made Amberoot trees a bit more common in magnetic and arctic biomes
Improved snow generation in arctic biomes to have less chunk border cut-offs
Rebalanced build-up effect durations; previously most effects triggered so rarely due to low build-up making them seem bugged. Because of this a lot of mobs were way easier to defeat than they were meant to be. We do appreciate feedback on these changes.
Cockatrice will now deal venom build-up with melee attacks
Aechor Plants and Carrion Sprouts no longer spawn if there is a block above them
Reduced flying monster spawn rates
Adjusted Zephyr spawn costs
Reduced Zephyr follow range from 35 to 30
Reduced Zephyr flying speed from 0.1 to 0.07
Nerfed Zanite Armor attack speed bonus from +0.3 to +0.15
Nerfed Charm of Dexterity I attack speed bonus from +0.25 to +0.15
Nerfed Charm of Resistance I knockback resistance bonus from 25% to 10%
Renamed Spears to Pikes
Pendants are now repairable
Added pendants to the Irradiated Chunk loot table
The Aether II Spawn Eggs creative inventory tab is now sorted by category instead of alphabetically for vanilla parity
Fixed Aether Portals created in The Aether spawning in mid-air in the overworld
Removed Quicksoil from the portal whitelist
Raised cloud height from y256 to y320
Irradiated biome fog is less intense now
Fixes

The Iconic Dimension Mod Returns! Step into a renewed and expanded Aether Dimension with The Aether II!