Everything is as vanilla as possible for a 100% Advancements Skyblock.

## Notes

Justifications for every block:

Ocean ruin suspicious blocks for brushing advancement and sniffer eggs,
and would be falling without support blocks underneath

Trial chamber vaults necessary for advancements
Trial spawner spawning only cave spiders and breezes, both necessary for advancements and not available otherwise
(and both are mobs that would spawn in trial spawners regularly)

Sculk sensor and shrieker in ancient city locations for sneak advancements

Ocean monument with a "cage" for an elder guardian for killing every hostile mob

Desert village with a single sandstone block for a camel to stand on to breed every animal

Bastion remnant default chests for advancements, and loot

End portal frame at stronghold location to reach the end

Elytra frame needs a block
End City chest necessary for Horse Armor loot
Shulker for advancements

## Issues

Vault blocks spawned by custom structures are not interactable
= https://bugs.mojang.com/browse/MC-268618
Solution: Set server_data.state_updating_resumes_at manually to 0 with NBTExplorer

Elder guardian despawns
Solution: They spawn naturally at ocean monuments (for now)