Mobs
Flutterflies can only be found in the Overworld (Jungle & Mountain biomes). They drop Flutterfly keratin on death
Frolickers can only be found in the Overworld or the Comatose dimension. They do a 'tumbleweed' animation when in the Comatose dimension
Cosmo's can only be found in the Comatose dimension. Cosmo's are only able to be hurt when the attacker is holding any type of stone block. Cosmo's have a chance of spawning as an 'Alpha Cosmo' which by default will do more damage and inflict blindness on hit. They drop Cosmo spines on death
Snipe's can only be found in the Comatose dimension. They will attack players and Cosmo's with a ranged attack
Flare's can only be found in the Comatose dimension. They are similar to blaze's and will only attack players
Cosmic creeper's can only be found in the Comatose dimension. They are similar to creepers and endermen and will only attack players. When a cosmic creeper sees a target it will attempt to run up to it and teleport the target to it and instantly blow up. On death it spawns 5 Cosmic creeperites
Cosmic creeperites spawn when a Cosmic Creeper dies. They will attempt to teleport to their target and explode but the explosion does not hurt their target
Utterflies have not been fully implemented yet. Check back later for more info