Monsters from Metropilitan Era are way more powerful than their preceders. These mythic monsters can only be ranked up by using their own cells, nebula or ambrosia. They also have the ability to perform a Cap Breakout, allowing them to rank up to intermediate steps with less Nebula/Ambrosia. Additionally, players may have only one copy of each Metropolitan monster.

They also unlock a special slot for Obscure Talent. The Obscure Talents are a new type of item which can be only equipped by Corrupted Mythics that have been ranked up, starting from Rank 1.