Fairy Tail Staffel 2 (2010)

The first 20 episodes make up the "Nirvana" (ニルヴァーナ, Niruvāna) arc, which adapts Hiro Mashima's Fairy Tail manga from 16th through the middle of the 20th volume. The arc focuses on Fairy Tail's alliance with other guilds to take down the dark guild Oración Seis, aided by the Dragon Slayer Wendy Marvell and a reformed Jellal Fernandez. The next 4 episodes form the self-contained "Daphne" (ダフネ, Dafune) arc, where Gray Fullbuster seemingly betrays the guild and helps Daphne, a deranged wizard, capture Natsu to power an artificial dragon. The last 24 episodes adapt the rest of the manga's 20th volume through the beginning of the 24th volume to form the "Edolas" (エドラス編, Edorasu-hen) arc, wherein the guild becomes trapped in the parallel universe Edolas to be used by the world's ruler Faust to restore magic to his kingdom, and set out to return to their world with the aid of Faust's son Mystogan and Happy's race of winged cats called the Exceed.