Celebrating seven years of Clash of Clans in August 2019, this 2×2 birthday cake obstacle features a fun Easter egg — it costs 7,777 Elixir and rewards 77,777 Elixir, cleverly using repeating lucky sevens to honor the 7th anniversary. This playful numerical design detail was widely praised by the community as a charming Supercell touch. The 7th Anniversary also coincided with significant game updates including Town Hall 12 content additions. Players who kept this cake enjoy pointing out the matching lucky sevens to clanmates, making it a delightful conversation piece and a beloved symbol of CoC entering its seventh year of bringing clans together.