According to the search results, the rarest blook in Blooket is the Spooky Ghost, which is only present as an award for the 1st place in the game. However, there are other rare blooks in Blooket, such as the Megalodon, which is the hardest blook to achieve from the Legendary Blook Rarity and has a 0.2% chance of getting it. The Baby Shark blook is also a rare blook that is sought-after due to its adorable appearance and is the second rarest legendary blook. The Cyan Astronaut blook is the first Mystical Rarity Blook and is the rarest blook that sells for 1,000 tokens, and only two people have it. Other rare blooks include Tim the Alien, which is the rarest mystical blook with only two existing, and the Lucky Frog and Spring Frog Blook, which are the rarest Chroma Blooks with 100% rarity.