Just a heads up, on Crystal Isle, only three wild tropes can spawn at any given time. There will only be one per biome; the tropical, ember, and jungle biome are where they spawn. They spawn mid-air and can either fall to the ground or stay flying where they spawned. They appear to not have a limit to how high they go. This is all for official spawns. It’s day 4 of writing this and I’m still looking. Also for private servers, tropes will take ages to respawn, so give it like 30 minutes until they show up. Hope this helps.