Lezaford then identifies the book as the "Grimoire of the Rift", having the power to open portals between worlds and consequently being highly dangerous; the monstrous hand Clan Gully fought off belongs to a beast called the Neukhia, which could be summoned into Ivalice using the Grimoire. Illua wishes to harness powers beyond the portals and seeks the Grimoire's destruction. During his journey, Luso is forced to both act as representative for Clan Gully after Cid is injured on a mission, then confront a rogue Adelle and free her from Illua's control. During a final confrontation with Illua, a portal is opened and the Neukhia fully emerges, killing Illua before attacking the party. Luso's party defeats the Neukhia, and feels able to go home after bidding farewell to Clan Gully. Arriving back in the library, Luso encounters the school librarian—Mewt Randell, a major character from "Tactics Advance". Believing Luso's tale, Randell allows Luso to go home. Post-credits scenes show Luso enjoying summer break, Cid and Adelle continuing to adventure with Clan Gully, and Hurdy becoming a world-famous minstrel. "Tactics A2" was developed by Square Enix, owners and main developers of the "Final Fantasy" franchise. The game forms part of the "Ivalice Alliance", a series of games sharing the setting of Ivalice while taking place at different times in the land's history. The director was Yuichi Murasawa, who had directed the original "Tactics Advance". Akitoshi Kawazu acted as executive producer, a role he shared with the other "Ivalice Alliance" projects. The producer was Hiroaki Kato, while Kyoko Kitahara acted as scenario and event director. Character designs were by Ryoma Ito, who also worked on "Tactics Advance" and "Final Fantasy XII". The logo design was created by Akihiko Yoshida. Planning for "Tactics A2" began due to positive fan reception and demand for a sequel to "Tactics Advance", which released for the Game Boy Advance (GBA) in 2003. The team also wanted to add new features, as the short development time of the original "Tactics Advance" prevented their inclusion. Development was delayed due to Murasawa being occupied with other projects. The team initially planned to develop the game for the GBA, cutting down on development time.